Nielsen SoundScan began tracking sales data for Nielsen on March 1, 1991. The May 25 issue of "Billboard" published "Billboard" 200 and Country Album charts based on SoundScan "piece count data," and the first Hot 100 chart to debut with the system was released on November 30, 1991. Previously, "Billboard" tracked sales by calling stores across the U.S. and asking about sales—a method that was inherently error-prone and open to outright fraud. Indeed, while transitioning from the calling to tracking methods, the airplay and sales charts (already monitored by Nielsen) and the Hot 100 (then still using the calling system) often did not match (for instance Paula Abdul's "Promise of a New Day" and Roxette's "Fading Like a Flower" reached much higher Hot 100 peaks than their actual sales and airplay would have allowed them to).