WL (MBSL)

Months Counted

Decade

210.63

118

1936-1945

210.42

115

1946-1955

209.77

120

1956-1965

209.79

120

1966-1975

210.14

120

1976-1985

210.53

120

1986-1995

211.75

120

1996-2005

212.43

132

2006-2016