每年基本1.7 百万考SAT, 得1600分的有300人，也就是0.018%. （https://blog.prepscholar.com/how-to-get-a-perfect-sat-score-by-a-2400-sat-scorer）
另外，下面这个表的数字基本和0.018%符合。
| Old SAT Score | New SAT Score | Percentile |
| 2400 | 1600 | 99.9826 |
| 2390 | 1593 | 99.9581 |
| 2380 | 1587 | 99.9411 |
| 2370 | 1580 | 99.9157 |
| 2360 | 1573 | 99.8801 |
| 2350 | 1567 | 99.8413 |
https://blog.prepscholar.com/sat-percentiles-high-precision-2016
2017年ACT数据, 基于2百万考生。
| Score | # of Students | Percentage of All Test Takers |
| 36 | 2,760 | 0.136% |
| 35 | 12,386 | 0.610% |
| 34 | 20,499 | 1.010% |
| 33 | 26,920 | 1.326% |
Source: ACT.org
https://blog.prepscholar.com/how-many-people-get-a-34-35-36-on-the-act-score-breakdown
两个数据比较一下，大致可以得出结论：ACT满分比SAT满分大致容易十倍。
