2011

5.6

2012

6.3

5.4

2007

5.7

2012

9.3

1998

6.0

2017

5.9

2015

7.4

2006

5.7

2019

8.7

1988

5.2

1995

6.3

2001

6.7

1996

8.0

1991

7.4

2017

5.5

1969

6.8

1958

8.0

2001

6.1