1980

6.3

1985

7.2

1943

7.7

1952

7.7

1992

7.9

2002

6.3

2015

7.8

2017

4.7

2017

6.8

1965

6.4

1980

6.8

1974

5.0

1981

10.0

1950

6.7

1979

4.8

2006

6.0

2005

5.6

1960

5.7

1975

6.6

1966

5.7