1997

0.0

1990

7.4

1997

7.2

1999

6.6

1993

7.1

2001

7.4

2009

7.5

2002

2.7

2001

8.1

1996

5.7

1996

5.4

2000

5.1

2018

4.7

2000

7.1

1996

7.1

1996

6.9

2008

7.6

1994

6.0

2003

7.2