2002

6.4

1990

4.0

1993

7.6

1981

5.6

2015

7.2

2007

0.0

2005

8.2

1996

5.1

2008

4.2

2003

4.3

1979

6.8

1999

7.3

1986

7.0

1989

6.0

1982

6.3

1992

5.8

2000

3.0

1982

6.3

1983

7.5

2000

6.9

1999

8.3