2017

6.9

2007

8.1

1996

5.8

2013

5.7

2007

7.1

2014

7.7

2014

4.8

2014

5.4

1999

5.9

2015

7.2

2021

10.0

2014

6.0

2008

7.0

2009

4.8

7.8

1992

6.3

1988

6.3

1955

7.2

1999

7.2

2017

6.0