1998

6.0

1977

6.5

2012

5.8

2016

5.6

1993

6.1

1968

6.9

2006

7.0

1953

6.6

2014

5.5

2008

5.4

2007

6.7

2015

5.1

2015

6.3

1887

5.0

2005

5.5

1981

7.0

2021

7.7

2002

7.8

2005

6.4

1973

7.4