2014

6.9

2003

6.3

1994

7.8

1997

5.6

2003

4.4

1990

6.1

1992

6.7

2005

7.7

2010

6.0

2007

6.5

2012

5.8

2016

5.7

2012

6.3

1999

8.3

1993

8.4