Support only Python 2.7.
Test MMM 2009 annual report.
Test MMM 2012 Q1 report.
Test MMM 2013 Q2 report.
Test AXP 2010 Q3 report.
Test AXP 2012 Q2 report.
Test AXP 2012 annual report.
Test BA 2013 Q1 report.
Test BA 2011 Q3 report.
Test BA 2009 annual report.
Test CBS 2013 Q2 report.
Test CBS 2011 annual report.
Test CBS 2010 Q1 report.