1941

6.9

2007

5.1

1965

7.1

2008

5.7

1972

6.1

1975

6.7

1978

6.3

1991

6.6

1988

6.3

1994

5.8

1996

5.7

1979

7.5

2004

2.9

2004

4.7

1977

6.8

1971

7.1

1992

6.0

2003

6.3

2022

7.3

2021

6.5