Over the years: Twitter's growth in active users

In its regulatory filing, Twitter disclosed information showing its growth. Its worldwide user base has grown 44 per cent 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.

>> January-March 2010: 30 million

>> April-June 2010: 40 million

>> July-September 2010: 49 million

>> October-December 2010: 54 million

>> January-March 2011: 68 million

>> April-June 2011: 85 million

>> July-September 2011: 101 million

>> October-December 2011: 117 million

>> January-March 2012: 138 million

>> April-June 2012: 151 million

>> July-September 2012: 167 million

>> October-December 2012: 185 million

>> January-March 2013: 204 million

>> April-June 2013: 218 million