Update of RX U.S.A. sales:
1RX
1999 - 90,338
2000 - 89,864
2001 - 77,426
2002 - 72,963
2003 - 92,366
2RX
2004 - 106,531
2005 - 108,775
2006 - 108,348
2007 - 103,340
2008 - 84,181
2009 - 93,379
3RX
2010 - 95,790
2011 - 82,595
2012 - 95,381
2013 - 103,920
2014 - 107,490
2015 - 100,610
4RX
2016 -...