5.0

1998

7.0

2001

6.4

2012

5.2

2002

7.4

1972

7.9

1979

6.1

1989

6.7

2006

8.0

2007

6.7

1970

8.2

2016

7.0

1959

8.1

1993

6.2

2004

6.8

2015

5.5

2005

7.1

2007

6.0

1997

6.8

2001

6.1