update readme

README.md

@@ -42,8 +42,8 @@ Three point estimates
  +----------------------------------------+
  | confidence    |            |           |
  +----------------------------------------+
- | 1 Sigma - 68% |      20.95 |     23.37 |
- | 2 Sigma - 95% |      19.74 |     24.58 |
- | 3 Sigma - 99% |      18.53 |     25.79 |
+ | 1 Sigma - 68% |      20.34 |     23.98 |
+ | 2 Sigma - 95% |      18.52 |     25.80 |
+ | 3 Sigma - 99% |      16.70 |     27.62 |
  +----------------------------------------+
  </pre>