1996

7.3

2003

5.1

2001

7.6

2000

6.7

2001

5.6

1978

6.5

1998

7.3

2014

6.9

2009

5.5

1994

6.3

2006

0.0

2003

6.4

1993

7.4

1992

7.2

2002

5.9

2000

6.1

2000

7.3

2000

6.8

2001

4.9

2003

6.3