1995

5.9

2013

6.1

1999

6.7

2017

6.6

2023

6.2

1972

7.4

1980

6.6

2011

6.6

1959

6.1

2014

6.7

2018

6.8

2015

6.5

2003

6.3

2020

7.0

2017

7.6

2000

5.0

1948

6.3

1966

6.1

2016

5.7

1993

6.5