2004

5.5

2005

6.3

2005

5.8

1969

3.8

1999

5.3

1995

4.1

2010

4.8

2009

6.6

1974

6.0

2008

5.9

1993

6.2

2015

5.4

1979

2.0

2000

5.6

2003

6.2

2005

2.3

2006

7.0

1988

4.9

1994

5.5

2013

2.0