1989

8.1

2010

0.0

1985

5.5

1985

6.4

1978

8.0

1997

7.5

1993

6.1

2000

5.5

2005

8.0

1995

5.4

2013

5.9

1996

5.2

1977

7.4

1999

7.0

1982

7.2