1990

5.8

1964

7.0

2004

7.1

1970

6.6

2013

6.0

2020

7.6

1962

8.4

1956

7.5

1972

8.1

2012

7.8

1966

7.4

1998

7.2

2012

7.1

1973

7.5

1982

7.6

1976

7.3

1964

7.4

2016

4.6

2001

6.6

2019

6.4