1971

7.2

2006

6.1

2006

7.5

1972

8.7

1974

8.6

2017

5.4

2001

7.2

2008

6.9

1964

7.5

2007

7.1

2007

6.7

2000

6.9

2005

6.5

1995

7.9

1975

7.5

1999

5.9

2013

0.0

2009

5.7

1987

6.0

2007

7.3