2003

6.7

1962

5.9

1982

5.4

1985

6.1

1976

6.0

1964

6.1

1996

4.3

1992

7.1

1971

6.1

1997

6.3

1987

7.1

1958

5.2

2004

6.6

2012

5.8

1989

4.6

2010

2.8

2011

0.0

1984

5.0

1950

5.0

1987

6.3