1937

6.7

1989

5.9

1948

8.0

1967

7.4

2012

5.0

2008

6.8

1965

6.4

1989

7.2

1989

5.1

1990

6.4

1985

7.4

1986

5.2

1974

6.1

1990

6.1

1941

7.7

1962

7.9

1953

6.6

2014

6.8

1956

7.1

1947

7.0