1966

7.3

2001

7.7

2007

6.3

1999

5.7

1940

8.3

1964

8.1

1987

6.8

2005

7.5

2007

6.9

1973

0.0

1971

0.0

1995

6.6

1979

7.8

2012

1.5

2014

4.4

1985

7.7

2005

7.1

2000

7.3

1990

3.5

2006

7.4