1969

5.2

2014

6.5

2014

5.0

2017

6.0

1954

7.9

1971

6.4

1977

6.8

1990

8.5

2016

6.0

1999

5.7

1960

8.4

2005

7.8

1988

7.8

2005

6.3

1972

7.1

1997

7.5

1986

7.6

2006

5.6

1995

8.4

2004

7.2