Skoda Auto, the Czech unit of Volkswagen AG , reports that its unit sales growth worldwide slowed to 6.2 percent last year in a market slowdown, according to the Prague Business Journal. Skoda Auto, the largest Czech exporter, said its share of key markets abroad continued to grow, even while sales growth slowed from 13.5 percent in the first nine months of the year and from 13 percent in 2000.