2003

3.8

2005

6.3

2002

6.3

1992

5.0

2008

6.8

1989

6.0

2004

3.8

2001

5.4

1982

4.5

1991

5.8

2015

6.5

2014

5.4

1983

4.0

2011

5.3

1998

5.8

1971

4.8

2011

5.6

2021

3.6

2017

6.7

1977

4.1