1995

4.9

2000

5.9

1994

7.6

1994

4.6

1984

5.9

1990

5.1

1995

3.8

2003

8.2

1986

4.4

2002

7.0

2012

7.3

2013

7.5

2009

7.4

2010

7.5

1995

8.0

1985

7.3

2000

6.0

1994

6.0

2007

6.0

1993

6.0