1984

6.6

1985

7.1

1995

7.2

1967

6.5

2007

5.6

1989

6.6

1994

5.2

1992

5.5

1973

5.8

1988

5.9

1989

5.4

2003

5.6

2003

6.0

1932

6.7

1992

4.3

1965

5.6

1963

6.6

1970

6.1

1968

6.7

1982

5.5