1963

10.0

1987

4.6

1968

8.0

2008

3.6

2009

3.9

2009

3.8

2008

4.4

2013

6.7

2019

6.6

1978

7.5

1995

7.7

1992

7.0

2008

5.8

2008

5.6

2007

6.5

2002

6.2

2008

5.1

2006

5.5

2006

7.6

2006

6.4