1996

6.5

2014

7.9

2019

8.5

2015

7.5

1990

8.5

2009

7.6

2000

7.4

1982

7.9

2003

7.1

1960

8.4

2018

7.4

1998

7.2

2019

7.4

1987

7.7

2004

7.1

1991

8.3

1998

7.0

2001

7.8

2008

8.1

1994

8.3