1996

0.0

1998

5.4

1997

6.8

2006

4.6

2017

7.5

1999

5.0

1988

7.0

2014

7.9

1993

0.0

1998

5.8

1991

5.0

1995

4.3

2011

7.0

1989

7.1

2004

4.2