2018

6.4

2006

6.6

1992

6.0

2019

6.3

1951

7.2

2002

5.4

1997

6.0

2005

6.4

2003

5.9

2012

6.0

2018

6.7

2010

7.0

1987

7.9

1999

5.8

1942

8.6

1989

7.3

2009

5.2

2011

6.2

2013

7.3

1968

6.9