1988

5.3

2009

4.8

2003

5.8

1996

6.7

2014

5.5

2000

5.1

1993

6.1

2005

6.4

2012

5.8

2005

5.1

1887

5.0

2012

5.3

1989

7.0

2007

6.7

2021

7.7

1968

6.9

1982

6.2

1968

7.1

2006

5.5

2006

7.0