1962

7.9

1984

8.0

1991

8.1

1985

6.2

1996

5.9

1971

6.2

1990

5.9

2014

5.2

1986

4.5

2015

6.7

1995

3.6

1995

4.3

1964

6.6

1950

5.5

1977

5.1

2018

5.8

2023

7.5

1992

5.4

1976

6.6

1989

7.1