Comparative dates on which the Nationals notched their 19th win, each season:
2012 - 10th May (31st match of season)
2010 - 12th May (34th match)
2005 - 14th May (36th match)
2011 - 15th May (40th match)
2008 - 18th May (45th match)
2007 - 24th May (48th match)
2006 - 25th May (48th match)
2009 - 18th June (65th match)