1986

7.4

2019

8.1

2007

7.0

2009

6.2

2016

7.6

1952

7.9

2010

7.0

1995

5.4

2012

6.4

1972

6.4

2013

5.6

2016

7.6

2015

7.5

2007

6.7

1994

8.3

1928

8.0

1980

7.1

1954

7.2

1990

6.4

2018

7.2