1968

6.5

1965

6.7

1971

6.4

2022

7.8

1967

6.6

1990

7.4

1984

8.1

1964

6.8

1966

6.6

1955

6.1

1995

8.5

2013

6.1

2009

2.9

1983

4.4

1975

6.8

2011

7.2

1987

6.2

2001

7.3

2016

6.9

2014

6.2