1986

6.8

2020

7.3

6.1

2006

10.0

2009

6.7

2012

9.8

1993

5.5

2015

6.9

1993

6.6

1991

5.9

2012

9.7

1985

6.5

2015

5.6

2014

6.3

1994

5.7

2012

7.2

1980

6.2

2003

7.1

2001

7.3

1990

4.4