2016

6.4

2019

7.6

1995

4.0

1997

1.0

1968

5.0

2008

5.7

2009

6.6

2010

6.3

1985

6.8

2009

5.7

1953

6.0

2009

6.1

2007

3.7

2005

7.4

2009

5.1

2008

6.5

2009

7.6

2009

4.2