Return period (years)

10

20

50

100

500

Return level (years)

118.0

119.2

120.5

121.4

123.1

Standard error

0.6483

0.7894

1.046

1.283

1.917

95% CI

(116.7, 119.3)

(117.6, 120.7)

(118.5, 122.6)

(118.9, 123.9)

(119.3, 126.8)