2003

5.5

1955

7.3

1977

6.3

1990

6.7

1987

5.7

1997

6.8

1967

7.0

2010

6.1

2007

6.0

1995

6.5

2003

5.6

1998

7.0

1976

6.6

1944

7.4

1996

7.6

1959

8.1

1998

5.3

1990

7.4

1983

7.0

1947

7.3