1993

6.6

2004

8.3

2004

8.6

2000

8.1

1982

7.6

2012

6.3

1996

7.0

2008

7.7

1992

5.8

1989

7.8

2005

9.3

1991

7.7

2015

6.4

2012

6.2

1996

5.4

1998

7.2

1998

6.6

2003

7.9

2007

6.5

2015

7.9