2007

7.8

2020

6.3

1999

6.2

2003

8.0

2016

7.0

2000

6.3

2012

5.7

1999

8.4

2009

7.1

2010

4.4

2015

5.7

1951

7.8

1997

10.0

1992

7.6

2011

4.8

2011

5.0

2014

6.8