1994

6.5

1961

7.7

1966

7.3

2006

8.2

2004

7.0

2005

6.8

1964

6.2

2006

6.6

1991

4.7

1995

7.0

1992

7.5

2000

4.8

1995

6.7

1919

6.9

1942

6.6

1973

6.9

1942

7.3

1940

7.6

1974

7.3

2019

9.5