1989

3.0

1993

4.2

1997

5.3

2000

7.6

1989

1.3

2004

7.9

1988

4.4

2003

4.6

2002

6.9

1993

7.0

1984

7.3

1998

5.0

1987

1.0

2007

7.9

2000

7.1

2016

5.6

1988

5.3