1983

4.9

1980

6.0

2000

4.5

1986

5.0

1982

4.5

1976

5.9

2001

4.1

2014

7.9

1988

3.6

1989

7.0

2012

0.0

1995

0.0

2022

4.0

1973

5.5

2004

4.2

1991

4.7

1997

4.4