1976

7.7

1971

5.9

1969

6.2

1998

5.0

1970

4.6

1976

6.2

1990

7.4

1999

7.9

1966

7.6

1993

4.2

1985

7.1

1965

4.0

1977

5.9

1999

7.9

1973

6.8