Disappearing domain names

According to the information at dailychanges.com, the number of domain names actually decreased recently. The most recent data shows that although there were over 77,000 new domain names registered on January 23, 2012, there were also over 85,000 domain names deleted. That's something that I hadn't seen before. And I wouldn't be too surprised if this actually changes from day to day and isn't part of a bigger trend.