1982

7.6

2012

6.3

2021

6.2

1949

6.9

1955

7.2

2002

7.0

2016

6.9

1985

6.4

2013

7.6

2010

6.7

1992

6.7

2008

7.8

2006

6.2

2015

5.3

2003

6.2

2013

6.7

2012

5.8

1968

4.8

1975

7.5

1978

6.1