1986

6.8

2015

0.0

2008

5.6

2010

0.0

1951

5.0

2002

6.8

1981

7.6

2000

7.1

2016

8.0

2019

6.8

2000

0.0

1980

6.6

2014

6.0

1966

6.3

2009

6.2

1976

6.5

2025

0.0

2017

6.0

2021

4.7

2018

6.2