1999

6.2

2005

6.8

1928

6.9

1947

7.4

1970

7.1

1972

7.7

2003

7.4

2007

6.7

1994

3.5

1985

6.5

1997

7.1

1969

6.9

2007

7.2

1991

6.5

1992

5.4

1956

6.1

2002

5.9

1979

6.9

1962

7.3

1942

6.6