1967

5.0

1970

6.4

1982

5.8

2016

6.8

1982

5.2

1966

6.8

1977

5.2

2020

5.5

2019

6.0

1988

6.2

1968

7.1

2010

6.5

2000

8.5

1994

6.8

1969

5.4

1967

6.2

1997

5.1

2009

5.6

2014

5.8

1973

7.7