2015

6.8

1998

6.8

2004

6.8

1976

7.6

2004

5.3

1970

7.6

2005

6.3

1958

7.6

2002

6.2

1992

2.0

1960

7.5

2001

6.9

2002

7.5

1965

7.4

1997

6.5

2006

5.8

2007

6.4

2001

6.0

1977

7.2

2019

7.6