THE boom in Western Australian motor vehicle sales continued in February, with year-to-date sales up 17.7 per cent to 18,554, which was 2,785 more than in the previous corresponding period. That compares to the national average growth rate of 9 per cent, with WA leading the nation in year to date sales. Toyota continued to monopolise the top of the sales league ladder, with year-to-date sales hitting 4,318, a 26 per cent increase on the previous corresponding period.