Here's the US info from MINIUSA PR:

MINI USA reported an increase of 3.2 percent in October sales, with 3,189
MINI automobiles compared to the 3,091 sold in the same month of 2003. Year-
to-date, MINI sales were nearly level, with 28,859 cars compared to 28,811
sold a year ago.

And here are the numbers worldwide from the BMW Group Press:

Sales of MINI brand cars during the third quarter, at 47,713 units, were 1.0% ahead of the previous year (third quarter 2003: 47,252 units). The BMW Group sold 142,881 MINI brand cars during the first nine months of 2004, an increase of 4.2% over the previous year (first nine months 2004: 137,130 units). The MINI Convertible, which was newly presented in July 2004 and which is now available with three engine options, has been very well received by the market. 9,320 units had already been sold by the end of September.