2004

6.9

2003

7.2

1965

6.3

1972

4.9

1992

6.6

1965

6.1

2007

3.1

1974

7.2

1961

6.2

1947

6.0

1990

6.5

1955

6.8

1988

6.6

1970

7.5

2008

6.6

2000

6.4

1976

6.0

1989

6.6

1999

5.3

1958

7.6