2005

6.6

1996

5.3

2006

4.7

1973

7.7

2003

5.7

1999

5.8

1998

5.3

1981

6.2

1982

5.9

1984

6.1

1985

5.3

2021

6.1

1977

4.5

1990

6.2

2015

0.0

2013

4.5

2007

6.4

2008

7.5

2014

4.0

2025

8.4