1973

4.1

1979

6.8

1981

6.1

1978

5.6

1980

5.3

2022

5.6

1958

6.8

2002

8.7

1934

7.2

2013

2.5

2011

4.0

1974

7.2

1977

6.9

1981

5.9

1983

6.2

1975

6.0

1987

7.3

1950

6.7

1986

6.3

1984

6.5