2019

6.5

2016

6.7

1980

5.9

2016

6.1

2003

6.8

1963

6.9

2013

6.1

1972

6.3

1978

5.9

2013

6.7

2004

6.4

1998

6.0

2010

6.1

1953

5.6

2012

5.3

2006

6.1

1988

6.4

1994

6.6

1989

6.2

1991

5.7