1960

7.4

2018

8.6

2001

8.0

2006

6.8

2019

7.8

2016

7.8

2005

8.7

2008

7.5

1997

7.3

2018

7.8

2018

7.9

2004

8.3

1991

7.2

2014

8.3

2015

7.0

1998

6.8

1996

7.7

1979

7.4

2022

6.2

1998

7.5