1990

4.4

1994

4.9

2010

7.1

1996

2.7

1988

2.0

2000

7.6

1997

6.1

2002

4.6

1988

5.8

1991

6.0

1986

6.0

1987

4.2

1982

6.0

1987

5.3

1977

5.5

2022

0.0