2010

7.7

2003

6.7

1992

7.4

2000

7.6

2006

6.7

2012

6.2

2015

7.1

1999

7.2

2000

4.9

1988

5.7

2004

6.7

1984

6.1

1996

6.3

1997

5.9

1997

7.0