1999

6.8

1990

6.4

1998

5.8

1982

7.2

1996

6.7

2002

7.4

1991

4.4

2016

6.0

1941

7.2

1946

7.4

2000

4.8

1957

5.0

1975

7.5

2003

5.4

2007

4.8

1979

5.2

2003

7.2

1997

6.2

1932

0.0

1977

5.7