| 本金: | 4675 | |
| 年度末 | 解約金 | IRR |
| 1 | 4192 | -10.3316% |
| 2 | 4451 | -2.4251% |
| 3 | 4719 | 0.3127% |
| 4 | 4996 | 1.6741% |
| 5 | 5282 | 2.4716% |
| 6 | 5531 | 2.8420% |
| 7 | 5787 | 3.0953% |
| 8 | 6002 | 3.1726% |
| 9 | 6227 | 3.2364% |
| 10 | 6458 | 3.2837% |
| 11 | 6700 | 3.3257% |
| 12 | 6950 | 3.3595% |
| 13 | 7208 | 3.3866% |
| 14 | 7477 | 3.4112% |
| 15 | 7755 | 3.4316% |
![Python Pandas GroupBy 的 size 陷阱：為什麼你的計數結果總是不對？如何計算重複次數? duplicates = df.duplicated( subset = [‘name’] )](https://i1.wp.com/savingking.com.tw/wp-content/uploads/2025/06/20250609143758_0_53821c.png?quality=90&zoom=2&ssl=1&resize=350%2C233 "Python Pandas GroupBy 的 size 陷阱：為什麼你的計數結果總是不對？如何計算重複次數? duplicates = df.duplicated( subset = [‘name’] )")
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