2013

7.7

2016

7.4

2017

5.9

1978

7.3

2020

7.3

1976

7.3

1986

6.6

1987

6.3

1984

6.8

1961

6.6

2014

5.7

1960

7.5

1997

7.7

2005

7.5

2015

7.1

2013

7.5

2010

6.9

1955

7.9

1980

7.0

1986

7.1