Return period (year)

10

20

50

100

500

Return level

7.84

8.10

8.41

8.60

8.99

Standard errors

0.0950

0.117

0.159

0.197

0.300

95% CI

[7.65, 8.22]

[7.87, 8.33]

[8.09, 8.72]

[8.22, 8.99]

[8.40, 9.58]