2003

7.1

1967

7.4

1991

7.8

2001

5.8

2002

6.4

1989

8.0

1999

7.7

2011

0.0

2010

5.0

2008

4.6

2015

7.0

2005

7.8

1996

8.5

1994

8.2

2005

7.3

2006

7.7

2004

7.5

1991

6.9

1996

6.4

1995

8.2