Year

January

February

March

April

May

June

July

August

September

October

November

December

1987

0.5

0

0.5

0.5

0.5

0

0.5

0.5

0.5

0

0.5

0.5

1988

0

1

0.5

0.5

0.5

0.5

0.5

0.5

0.5

0

0.5

0

1989

0

0

0.5

0.5

0.5

0

0.5

0.5

0.5

1

0.5

0.5

1990

0.5

0.5

0.5

0

0.5

0.5

1

0

0.5

1

0.5

0

1991

1

0

0

0.5

0

0.5

0.5

0

0

0.5

0

1

1992

0.5

0

0

0

1

0.5

0

1

0.5

0

0

0.5

1993

0.5

0

0.5

1

1

0.5

0.5

0.5

0.5

0.5

0

0.5

1994

0

0

1

1

0.5

0

0.5

1

0.5

0

0.5

0

1995

0.5

0

1.0

1

1

1

1

1

1

1

1

0.5

1996

1

1

1

1

1

1

1.5

1.5

1.5

1

1.5

1.5

1997

2

1

2

1.5

1

1

1

1.5

1

1

1

1.5

1998

1

2

1

1

1.5

1

1

1

1

1

1

1

1999

1

1

1

1

1

1

1

1

0.5

0.5

1

0.5

2000

1

1

1

1

1

1

1

1

1

1

1

1

2001

0.5

1

1

1

1

1

1

1

1

1.5

1

1

2002

1

1

1

1

1

1.5

1

2

1.5

1.5

1.5

1.5

2003

1

1

1

1.5

1

1

1

1.5

1.5

1.5

1.5

1

2004

1

2

1

1.5

1.5

2

1.5

1.5

1.5

1.5

2

2

2005

1

1

1.5

1

1

1.5

1.5

1

1

1.5

1.5

1.5

2006

2

2

1.5

1.5

1.5

1.5

1.5

1.5

1.5

1.5

2

1.5

2007

2

1

1

1

1.5

1

1.5

1

1

1

1

1

2008

2

1

1

1

1.5

1.5

2

1.5

2

1

2.5

2

2009

0.5

0

0.5

0.5

0.5

0

0

0

0

0

0

0.5

2010

0.5

0

0.5

0

0

0

0

0

0

0.5

0

0.5

2011

0

0

0.5

0.5

0.5

0

1

1

0

0

0

0

2012

0.5

1

0.5

0.5

0.5

0.5

0.5

0.5

0

0.5

0.5

0

2013

0.5

0

1

0.5

0.5

0.5

0.5

0.5

1

1.5

2

1.5

2014

2

2

2

2

2.5

2

2

2

2

2

2.5

2.5

2015

2

2

2

2

2

2.5

1.5

1.5

1.5

2

1.5

1.5

2016

2

2

1

2

2

2

1.5

2.5

3

2.5

2

1.5

2017

2

2

1

2

2

2.5

2

2

2

2

1.5

1