2018

6.5

2010

5.8

1974

8.6

1989

7.3

2003

6.2

1964

8.1

1987

7.5

1971

7.1

2003

7.8

1993

7.5

2007

7.0

1992

6.7

2012

7.0

2000

6.3

1990

6.1

2009

6.5

1969

6.6

2013

7.9

1988

6.5

1997

6.0