Return period (year)

10

20

50

100

500

Return level (s)

10.68

10.61

10.53

10.47

10.34

Standard errors

0.0396

0.0540

0.0806

0.106

0.182

95% CI

[10.60, 10.75]

[10.50, 10.71]

[10.37, 10.69]

[10.26, 10.68]

[9.98, 10.70]