2013

4.8

1994

6.2

2003

6.3

2007

6.7

2011

6.4

1997

7.9

2000

6.7

2002

6.5

2012

7.3

1985

6.1

2012

7.8

2004

8.0

1995

4.6

1990

5.8

1989

5.5

1988

6.2

2020

6.4

1998

6.9

2008

5.1

1998

6.0