1976

7.6

1971

5.9

1969

6.2

1998

4.9

1970

3.4

1976

6.3

1990

7.4

1999

7.9

1966

7.6

1993

3.7

1985

7.1

1965

3.6

1977

5.9

1999

7.9

1973

6.8