2000

8.1

2017

0.0

1989

6.6

1978

6.7

2005

6.9

1992

6.4

2001

5.5

1978

6.4

2004

5.3

1993

6.9

1989

5.9

2008

7.1

2001

5.7

1988

7.0

1972

7.2

2004

7.2

2013

5.6

2000

4.4

1991

6.1

1994

5.4