1988

7.2

1999

6.0

2013

0.0

2018

7.5

2019

8.0

2001

7.6

2009

7.2

2000

7.4

2010

8.3

2003

0.0

2016

5.2

1978

5.2

2004

4.9

1937

5.0

2002

6.0

2006

5.0

2019

8.0

1979

7.0

1983

6.6

2015

6.9