1966

6.2

1984

7.2

1988

6.3

2007

5.4

1982

6.7

1987

6.0

1987

6.0

1959

6.1

2019

6.6

2007

6.2

1973

6.3

1999

4.6

1998

6.5

1971

6.5

2017

6.9

2017

6.6

1976

6.2

2002

6.1

2014

6.7

2018

6.2