2009

7.3

2006

7.8

2005

8.1

1999

7.7

1996

6.4

2001

6.6

1967

7.7

2014

5.2

2020

0.0

1983

6.0

1969

8.2

1987

7.5

1984

7.2

2013

6.7

1973

5.9

2005

7.7

2003

8.1

2006

9.0

1990

7.0

2006

7.0