1996

5.8

2011

7.1

2008

6.3

2007

10.0

2012

7.3

2009

5.5

2016

6.9

2013

7.6

2013

9.6

2019

7.5

2020

4.7

1991

5.7

2003

6.3

1993

5.8

1965

7.0

1997

7.6

2010

6.9

1953

6.6

2010

7.1

1959

7.8