| Q3 2026 | Sep 30, 2026 | 7.0% | +8.0 pts | CPKC Form 8-K, filed 2026-10-28 ↗ |
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| Q2 2026 | Jun 30, 2026 | 3.0% | +7.0 pts | CPKC Form 8-K, filed 2026-07-29 ↗ |
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| Q1 2026 | Mar 31, 2026 | -7.0% | -10.0 pts | CPKC Form 8-K, filed 2026-04-29 ↗ |
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| Q3 2025 | Sep 30, 2025 | -1.0% | -2.0 pts | CPKC Form 8-K, filed 2025-10-29 ↗ |
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| Q2 2025 | Jun 30, 2025 | -4.0% | -7.0 pts | CPKC Form 8-K, filed 2025-07-30 ↗ |
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| Q1 2025 | Mar 31, 2025 | 3.0% | -17.0 pts | CPKC Form 8-K, filed 2025-04-30 ↗ |
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| Q4 2024 | Dec 31, 2024 | -2.0% | -23.0 pts | CPKC Form 8-K, filed 2025-01-29 ↗ |
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| Q3 2024 | Sep 30, 2024 | 1.0% | -19.0 pts | CPKC Form 8-K, filed 2024-10-23 ↗ |
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| Q2 2024 | Jun 30, 2024 | 3.0% | -25.0 pts | CPKC Form 8-K, filed 2024-07-30 ↗ |
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| Q1 2024 | Mar 31, 2024 | 20.0% | +2.0 pts | CPKC Form 8-K, filed 2024-04-24 ↗ |
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| Q4 2023 | Dec 31, 2023 | 21.0% | 0.0 pts | CPKC Form 8-K, filed 2024-01-30 ↗ |
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| Q3 2023 | Sep 30, 2023 | 20.0% | +3.0 pts | CPKC Form 8-K, filed 2023-10-25 ↗ |
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| Q2 2023 | Jun 30, 2023 | 28.0% | +13.0 pts | CPKC Form 8-K, filed 2023-07-27 ↗ |
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| Q1 2023 | Mar 31, 2023 | 18.0% | +10.0 pts | CPKC Form 8-K, filed 2023-04-26 ↗ |
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| Q4 2022 | Dec 31, 2022 | 21.0% | +15.0 pts | CPKC Form 8-K, filed 2023-01-31 ↗ |
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| Q3 2022 | Sep 30, 2022 | 17.0% | +9.0 pts | CPKC Form 8-K, filed 2022-10-26 ↗ |
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| Q2 2022 | Jun 30, 2022 | 15.0% | +18.0 pts | CPKC Form 8-K, filed 2022-07-28 ↗ |
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| Q1 2022 | Mar 31, 2022 | 8.0% | +12.0 pts | CPKC Form 8-K, filed 2022-04-27 ↗ |
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| Q4 2021 | Dec 31, 2021 | 6.0% | +10.0 pts | CPKC Form 8-K, filed 2022-01-27 ↗ |
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| Q3 2021 | Sep 30, 2021 | 8.0% | +13.0 pts | CPKC Form 8-K, filed 2021-10-20 ↗ |
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| Q2 2021 | Jun 30, 2021 | -3.0% | -4.0 pts | CPKC Form 8-K, filed 2021-07-28 ↗ |
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| Q1 2021 | Mar 31, 2021 | -4.0% | -2.0 pts | CPKC Form 8-K, filed 2021-04-21 ↗ |
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| Q4 2020 | Dec 31, 2020 | -4.0% | -2.0 pts | CPKC Form 8-K, filed 2021-01-27 ↗ |
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| Q3 2020 | Sep 30, 2020 | -5.0% | -6.0 pts | CPKC Form 8-K, filed 2020-10-20 ↗ |
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| Q2 2020 | Jun 30, 2020 | 1.0% | -4.0 pts | CPKC Form 8-K, filed 2020-07-22 ↗ |
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| Q1 2020 | Mar 31, 2020 | -2.0% | -9.0 pts | CPKC Form 8-K, filed 2020-04-21 ↗ |
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| Q4 2019 | Dec 31, 2019 | -2.0% | -10.0 pts | CPKC Form 8-K, filed 2020-01-29 ↗ |
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| Q3 2019 | Sep 30, 2019 | 1.0% | -3.0 pts | CPKC Form 8-K, filed 2019-10-23 ↗ |
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| Q2 2019 | Jun 30, 2019 | 5.0% | +9.0 pts | CPKC Form 8-K, filed 2019-07-16 ↗ |
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| Q1 2019 | Mar 31, 2019 | 7.0% | +11.0 pts | CPKC Form 8-K, filed 2019-04-23 ↗ |
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| Q4 2018 | Dec 31, 2018 | 8.0% | +9.0 pts | CPKC Form 8-K, filed 2019-01-23 ↗ |
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| Q3 2018 | Sep 30, 2018 | 4.0% | +5.0 pts | CPKC Form 8-K, filed 2018-10-18 ↗ |
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| Q2 2018 | Jun 30, 2018 | -4.0% | -12.0 pts | CPKC Form 8-K, filed 2018-07-18 ↗ |
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| Q1 2018 | Mar 31, 2018 | -4.0% | -3.0 pts | CPKC Form 8-K, filed 2018-04-18 ↗ |
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| Q4 2017 | Dec 31, 2017 | -1.0% | +5.0 pts | CPKC Form 8-K, filed 2018-01-18 ↗ |
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| Q3 2017 | Sep 30, 2017 | -1.0% | +2.0 pts | CPKC Form 8-K, filed 2017-10-17 ↗ |
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| Q2 2017 | Jun 30, 2017 | 8.0% | +10.0 pts | CPKC Form 8-K, filed 2017-07-19 ↗ |
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| Q1 2017 | Mar 31, 2017 | -1.0% | -10.0 pts | CPKC Form 8-K, filed 2017-04-19 ↗ |
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| Q4 2016 | Dec 31, 2016 | -6.0% | -21.0 pts | CPKC Form 8-K, filed 2017-01-18 ↗ |
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| Q3 2016 | Sep 30, 2016 | -3.0% | – | CPKC Form 8-K, filed 2016-10-19 ↗ |
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| Q2 2016 | Jun 30, 2016 | -2.0% | – | CPKC Form 8-K, filed 2016-07-20 ↗ |
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| Q1 2016 | Mar 31, 2016 | 9.0% | – | CPKC Form 8-K, filed 2016-04-20 ↗ |
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| Q4 2015 | Dec 31, 2015 | 15.0% | – | CPKC Form 8-K, filed 2016-01-21 ↗ |
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