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A look at Twitter's growth in active users

The Associated Press

FILE - In this Feb. 2, 2013, file photo, a smartphone display shows the Twitter logo in Berlin, Germany, Twitter unsealed the documents Thursday, Oct. 3, 2013, for its planned initial public offering of stock and says it hopes to raise up to $1 billion. (AP Photo/dpa, Soeren Stache, File)

In its regulatory filing, Twitter disclosed information showing its growth. Its worldwide user base has grown 44 percent over the past year, measured by the number of users who log on in a given month. Here is a quarter-by-quarter look at the number of such users since 2010, with the figure shown for each quarter reflecting the average of the three months.

30 million, January-March 2010

40 million, April-June 2010

49 million, July-September 2010

54 million, October-December 2010

68 million, January-March 2011

85 million, April-June 2011

101 million, July-September 2011

117 million, October-December 2011

138 million, January-March 2012

151 million, April-June 2012

167 million, July-September 2012

185 million, October-December 2012

204 million, January-March 2013

218 million, April-June 2013