1964

7.4

1951

6.3

2004

5.7

2009

6.9

2000

5.6

1983

0.0

1992

0.0

1960

3.0

1990

6.5

1975

0.0

2013

5.0

2003

5.7

1997

7.6

1947

1.0

2005

6.7

1998

6.6

2000

8.1

1962

7.6

2006

7.1

1985

3.5