1962

7.0

1963

7.1

1964

7.3

1965

6.7

1967

6.6

1969

6.6

2005

7.8

1971

6.4

1985

6.2

2004

4.5

1996

5.5

1966

6.4

2016

6.9

2022

5.6

2023

6.9

2008

8.0

2006

6.5

1985

8.0

1998

4.4

2003

5.8