1960

0.0

2006

8.8

2015

7.0

1997

7.4

1964

7.1

2007

7.7

1965

7.9

2015

7.1

2004

7.8

1961

7.7

2015

5.8

2007

7.9

1974

7.3

2016

5.7

2001

5.4

1979

5.0

1965

7.4

1984

6.6

1981

7.1

1966

7.6