From BMW Group PressClub USA:

The MINI brand delivered 2.3% more units in April, at 17,718 (prev. yr. 17,320) vehicles. Between January and April, 67,250 MINI cars were sold. This represents a 10.4% increase in sales.

April 2010 April 2009 change year-to-date 2010 year-to-date 2009 change
17,718 17,320 2.3% 67,250 60,912 10.4%

See all MINI sales worldwide by month.