1965

6.8

2019

6.4

2015

6.0

1982

5.2

1955

8.0

2018

5.1

1962

7.0

1989

7.4

1952

7.9

1968

7.3

2013

7.5

1960

7.5

2014

6.8

2009

7.0

1992

6.1

1959

7.5

1968

5.6

1927

7.8

1988

5.9

1988

6.1