1997

7.6

1994

5.7

1975

3.1

1993

4.2

1984

6.5

1983

5.9

1979

4.9

1960

6.2

1991

4.8

2021

3.0

1968

5.4

2005

6.4

1915

5.9

2003

3.8

1992

5.0

2020

3.5

2022

5.8

1971

6.3

2001

5.3

1982

4.7