1999

7.3

2012

6.8

2007

6.3

2020

4.2

2006

5.8

1988

6.6

2017

6.7

1985

4.1

1997

6.5

2014

2.9

1998

6.0

1998

7.4

2006

5.3

1998

6.9

1987

4.5

2003

5.9

2016

5.9

1988

7.4

2007

5.1

2005

5.1