2015

6.3

2005

6.8

2014

7.3

2001

8.4

2003

7.1

2015

8.7

2012

6.8

1992

5.9

2001

8.0

1989

7.7

2014

7.9

2016

7.8

2005

7.6

2002

7.5

1990

7.8

1988

6.5

2009

6.6

1965

7.8

2000

8.0

1993

7.0