1996

3.5

1987

5.6

1962

7.6

1995

7.3

1996

6.1

1979

4.8

1967

6.9

1985

5.8

1986

6.1

2002

4.0

1983

6.4

1972

0.0

1979

2.7

1999

6.7

1984

5.8

1972

5.7

1999

6.7

1966

6.6

1982

7.5