2003

7.1

2006

6.8

2003

6.5

1976

6.6

1991

6.7

1984

7.1

2005

5.5

2007

7.3

1990

6.5

2007

7.1

2004

6.8

1999

6.2

2007

6.6

2017

0.0

1990

6.1

1993

7.3

1996

6.9

1996

7.0

1997

5.5

2003

6.5