2005

6.6

2004

6.4

1992

5.8

1994

4.5

2013

5.2

2017

5.2

2019

7.3

2013

5.6

2001

3.3

2017

2.7

1996

6.4

1983

5.8

2002

7.4

2006

7.1

2000

6.7

1999

5.4

2007

6.2

1986

6.9

2006

5.9

2007

7.0