1968

0.0

1970

5.3

1954

6.7

2007

5.6

1961

7.7

1965

7.0

1946

7.6

1968

6.0

1955

6.6

1975

5.1

1951

4.5

1993

6.4

1997

7.7

2015

5.7

1996

5.8

1998

7.1

2017

7.3

1995

6.5

1996

6.9

2008

6.7