-50
-25
0
25
50
2004
2006
2008
2005
2007
2009
28 Jun 2009
Series 0: 8503
Series 1: 8260.4
5000
7500
10000
12500
15000
2004
2006
2008
2005
2007
2009
28 Jun 2009
Series 0: 8503
Series 1: 8260.4
2004
2006
2008
2005
2007
2009
First plot: set date for the changes zero of the series.
Second plot: date without changes zero of the series.
2009
2008