1996

7.0

2001

7.4

1991

5.7

2004

5.2

2019

1.8

1970

3.8

2017

5.9

2003

6.6

1998

6.5

2013

1.7

1973

3.4

2013

5.8

2007

6.2

2006

6.2

2013

6.2

2014

6.0

2001

5.8

2016

3.0

2014

4.8

1955

7.2