2005

7.2

1970

7.6

2001

6.8

2008

6.9

1970

3.8

2008

5.1

2013

5.3

1950

6.0

2012

0.0

1993

6.5

1971

7.2

2000

6.2

2005

5.4

2007

5.8

1964

6.1

1978

5.0

1974

6.0

1984

1.0

2014

4.1

2007

3.9