1997

6.5

1990

3.7

1994

4.4

1979

0.0

1974

0.0

1989

3.4

2002

4.3

1995

10.0

1976

5.2

1977

3.6

1994

5.0

1998

4.2

1992

5.5

1989

4.9

1972

4.0

1982

5.1

1964

5.0

2002

2.2

1997

4.0

1988

2.4