2005

5.3

2008

5.2

1995

5.6

2007

4.8

2004

7.3

2005

6.1

2007

5.4

2003

7.0

2003

6.4

1979

7.1

2001

7.2

1983

1.5

2016

5.5

1979

4.5

1952

7.6

2006

5.8

2003

5.9

1981

6.8

2008

5.0

2009

2.2