Simply put, Facebook had a terrific 2009.  This afternoon, comScore provided some statistics that cover the entire year, and the easiest way to sum them up is by saying that double- or triple-digit growth occurred in an impressive eight out of ten categories.

According to comScore, the total number of unique visitors to Facebook increased 105 percent between December of 2008 and December of 2009, hitting 111.8 million before the new decade began.  At the same time, the number of average daily visitors increased by an even greater amount: 181 percent.

Meanwhile, the total minutes and total pages viewed stats rose 198 and 151 percent, respectively.  Average usage days per visitor hit 10.4 (up 37 percent), average minutes per visitor totaled 246.9 (up 45 percent), and average visits per visitor reached 27.4 (up 64 percent).  And total visits increased 236 percent.

The only sort of weak metrics were the average minutes per visit measurement (down 11 percent, probably due to people visiting the site so often), and the average minutes per usage day tally (up just 6 percent).

So Facebook's certainly starting 2010 in a much stronger position than it entered 2009.  And looking at the tail end of the line in comScore's graph, it doesn't appear that the social network's stats are going to plateau anytime soon.

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