2004

6.4

2007

6.1

1982

6.8

1986

6.7

2008

6.4

2001

5.6

2002

5.9

2018

6.8

2006

6.7

2004

6.6

2004

5.7

1980

7.5

2017

6.7

2001

7.0

2004

6.0

1999

6.3

2003

6.5

1992

5.8

1992

5.6

1982

5.4