1982

7.1

1990

8.3

2000

7.7

2002

7.5

2006

6.9

2020

8.1

1991

7.8

1984

7.8

1999

6.5

1994

10.0

1996

7.3

2021

6.7

1993

6.6

1998

7.3

2006

0.0

2003

0.0

1986

0.0

1981

6.3

1980

5.0

2012

7.5