1995

7.7

1994

7.5

2002

7.4

1980

0.0

1988

5.7

1992

5.3

1981

6.6

2007

4.0

1984

7.4

1999

7.7

1986

4.0

2005

7.4

2002

8.2

2001

8.0

1999

7.5

1983

5.2

2013

7.5

2020

0.0

2013

7.0

1999

7.0