2000

5.1

1999

0.0

2000

7.9

2003

7.8

1978

5.9

1990

7.4

1999

7.9

1997

6.3

1972

5.1

1980

5.9

1987

7.2

1986

4.3

1981

4.2

1969

6.7

1988

5.8

1999

7.9

1975

7.3

1983

0.0

1983

7.2

1989

5.5