2016

8.6

2001

7.6

2003

8.2

1989

8.3

2002

7.5

1998

7.1

2015

8.2

2001

8.0

2012

7.3

2008

8.9

1993

7.7

1964

7.9

2000

7.5

1961

7.8

1994

8.0

1986

7.7

2003

7.9

2004

6.3

2008

7.6

2009

7.4