1999

4.8

1986

7.1

1992

4.1

1938

6.5

1988

4.5

2020

5.1

1996

6.1

2008

6.6

1986

5.6

1982

6.0

1977

5.6

1981

7.4

2006

5.2

2001

6.8

1975

6.3

1979

4.7

1974

5.7

1973

7.3

2007

4.2

2001

6.9