1995

6.8

2000

6.6

1982

4.6

1993

5.8

1984

4.4

1987

9.5

1999

9.3

2003

10.0

1984

7.3

1990

5.0

1990

6.1

1989

5.2

1987

6.8

1979

7.1

2009

5.7

2001

5.3

1986

7.6

2004

6.1