1961

7.2

2001

6.4

2005

6.8

2006

6.7

2006

4.9

1996

6.2

2016

7.0

1999

7.6

1952

7.8

1970

6.9

1959

5.4

1984

5.0

1955

6.4

2004

6.4

1968

0.0

1979

5.0

1976

5.8

1966

7.2

1943

5.4

1976

6.0