1950

5.7

2000

6.3

1953

6.9

1962

7.3

1998

6.6

2003

5.8

1987

7.1

2019

10.0

2005

7.0

2006

7.5

1994

6.3

1968

7.3

1991

7.5

1939

5.8

1932

7.0

1997

7.4

1991

6.8

2016

6.7

1996

6.6

1997

6.5