1990

7.0

1964

7.9

2004

8.6

2014

8.4

5.8

1986

8.3

2013

8.2

1993

6.6

1992

6.9

1996

7.7

2012

6.7

1989

8.4

2006

7.5

1984

8.4

2013

8.1

1991

7.6

1997

7.7

2010

7.8

2021

7.6

2012

6.3