1987

7.8

1986

7.5

1999

6.9

2018

5.8

1977

7.3

2016

0.0

2009

5.6

2017

7.0

2008

2.0

2008

1.5

2003

7.2

1996

6.2

1928

0.0

2015

0.0

1954

6.3

2020

9.0

1995

7.6

1961

6.1

2022

0.0

2019

7.8