2011

7.1

2014

5.6

1999

7.4

2012

7.7

1995

4.6

1987

6.5

1953

7.3

2012

6.3

2020

7.0

1989

5.5

2010

6.6

2013

6.1

2017

5.9

1968

6.4

1961

6.9

2009

6.1

1988

6.5

2001

8.9

1955

7.2

1992

6.4