1978

7.4

2001

7.8

1995

0.0

2005

6.2

2010

5.6

2014

6.4

2006

6.8

1998

6.4

1996

5.5

1983

6.6

1986

7.6

2000

7.6

2003

6.0

2002

7.1

1979

7.5

2005

6.7

2017

7.9

2001

6.5

2004

6.5

2001

6.4