1940

7.2

1998

6.9

2003

7.1

1953

8.0

1930

7.3

1950

8.1

2002

6.0

2008

6.4

1978

0.0

1932

7.5

1995

6.7

1931

8.3

1946

7.0

1997

7.2

1984

6.7

2001

7.3

1985

6.2

1959

6.1

2007

7.1

2017

6.3