1986

6.2

2013

6.5

1975

6.3

1996

6.5

1999

6.8

1980

5.9

1966

6.1

2009

6.8

2017

6.1

2003

6.8

2015

7.3

2006

6.8

1953

7.2

2017

6.6

2006

6.7

2016

7.4

2022

6.1

2001

7.8

2016

6.7

1975

6.4