1979

5.6

1954

6.7

1966

6.3

1992

6.3

2007

5.7

2004

6.9

2005

6.3

2003

7.2

2017

5.1

2006

7.6

2000

6.3

1960

6.6

2016

4.6

1946

7.4

1956

7.7

1968

4.2

1963

6.9

1964

6.6

1964

7.4

1981

7.1