Years

Months

March

April

May

June

July

1976-1985

0.6

2.6

4.0

1.9

2.7

1986-1995

0.9

1.5

1.9

3.6

1.8

1996-2005

1.5

2.7

2

2.4

2.7

2006-2015

1.7

2.0

4.9

5.2

3.4