1992

0.0

1997

6.2

1998

6.6

1988

5.0

1993

5.4

1989

6.0

1991

5.9

1995

5.9

1993

0.0

2002

5.7

1992

3.5

1990

5.5

1995

4.7

1973

7.3

2000

6.5

1987

4.9

1990

0.0

1996

7.5

2016

6.3

2013

6.4