1988

3.8

1964

5.6

1981

8.0

1975

9.0

1998

5.5

1951

8.6

1968

7.1

1987

6.4

1992

2.7

1985

5.3

1984

5.9

2002

5.9

1990

7.4

1999

7.9

1977

6.0

1979

5.0

1984

7.5

2001

6.2

2010

6.6

1980

5.0

1961

0.0

1974

5.0

1977

0.0

1997

6.5

1973

5.7

1999

0.0

1982

7.1

1983

0.0

1975

7.2

1976

0.0

1982

5.9

1976

7.2

1975

6.0

2001

0.0

1975

7.5

1975

5.8

1976

5.0

1971

5.5

1982

4.0

2010

5.1

1993

6.0