2011

7.4

2014

6.3

2003

7.2

1980

7.1

1962

6.9

1977

7.0

1984

6.6

2009

6.7

2013

7.6

2004

7.2

1986

7.9

2015

5.9

1974

7.0

2010

7.2

2017

4.8

2021

7.1

2009

5.7

1966

6.5

1990

7.5

1985

6.4