1952

7.0

1964

7.4

1970

6.4

2016

6.5

2021

7.7

1964

7.1

2013

7.6

1989

7.3

2009

6.6

2001

5.9

2016

7.1

2011

7.5

2017

6.1

2019

7.7

1992

7.7

2016

6.8

1958

7.3

2016

7.3

1999

6.5

2009

6.2