2012

5.1

2013

6.4

2019

5.4

2006

5.6

2001

5.2

1993

5.5

2016

6.8

1979

6.7

1984

6.3

1992

6.2

1986

7.6

2011

5.7

1989

5.9

2008

6.9

2016

6.9

1986

6.3

1999

6.8

2012

6.5

2003

5.3

1970

6.9