2015

7.4

2014

5.6

1990

6.5

1975

7.9

1974

7.0

1982

7.6

1969

5.9

1989

5.1

1965

6.8

1940

7.0

1944

7.4

2015

6.0

1984

6.1

1971

6.7

2003

6.8

1974

5.2

2001

7.9

1963

7.2

1954

7.2

1980

6.8