2006

7.0

1986

6.3

1994

5.8

1979

5.7

1947

6.4

2006

6.5

2003

6.5

1997

5.0

1944

6.3

1968

6.4

2001

5.6

2008

4.6

1988

5.6

2003

7.3

1959

6.9

1966

7.1

1980

5.3

2006

6.0

1985

4.1

2001

5.9