2007

5.7

1961

6.9

2015

6.6

2015

6.6

1992

6.4

2003

5.6

2011

4.7

2009

5.3

1999

6.8

1994

6.5

1988

5.2

2000

6.4

1987

6.5

1991

4.7

2014

5.0

1996

5.8

2012

6.2

1999

8.0

2012

9.7

1993

6.4