2015

5.1

2007

7.6

2009

7.9

1998

6.2

2014

7.8

2001

8.0

2015

8.0

2001

6.0

2021

6.2

2020

7.9

1967

6.6

2015

6.6

7.0

2012

7.7

1973

6.4

2009

6.6

1953

6.8

1966

6.1

2018

6.7

2013

6.4