2013

6.7

2004

6.3

1972

6.9

2005

5.5

2003

6.5

1990

6.8

1994

2.5

2002

4.8

2005

5.9

1969

2.8

1980

1.0

2004

5.6

1987

7.3

1988

5.0

1980

2.0

1976

2.0

2003

3.5

1996

6.6

2002

7.1

2005

6.3