1962

7.4

1984

7.3

1985

6.7

1997

6.4

2018

6.0

1969

6.6

1967

6.8

1999

6.3

1977

5.6

2008

7.0

1983

6.3

2011

5.2

2021

9.2

2003

7.3

1998

5.4

1978

6.0

1996

6.4

1971

7.5

1990

7.3