2003

7.2

2005

7.7

1999

3.5

2008

5.0

1976

6.6

1975

0.0

2008

5.0

1956

7.1

1953

7.5

2009

5.3

1952

4.0

1962

6.7

1958

6.4

1954

7.3

1983

6.0

1964

7.2

2007

6.5

1982

0.0

1932

5.5

1971

7.6