1991

3.6

2004

6.3

1990

3.0

1989

4.4

2000

0.0

1988

4.3

1982

0.0

1992

5.3

1981

4.6

1980

7.3

1994

3.2

1992

3.8

1995

6.8

1961

5.1

2019

2.0

1983

3.9