2012

7.2

2019

8.1

1961

7.3

1997

7.0

2001

6.6

1956

7.5

1978

8.0

2018

7.0

1983

7.9

1996

6.4

1988

7.4

1950

7.6

2009

7.0

2011

7.2

1986

6.5

1982

6.8

1990

6.5

1998

5.0

2015

6.5