1932

4.5

1999

6.1

1962

1.0

1992

6.3

1999

5.9

1988

6.2

1999

6.2

1996

6.9

1994

5.5

1942

6.0

2006

6.8

2001

6.7

1991

6.2

1949

6.2

1940

7.6

1994

5.2

1964

6.6

1934

7.8

2008

6.4

2000

4.7