22. Revenue

Revenue comprised the following for the years ended 31 December 2013, 2012 and 2011:


2013 2012 2011
Local telephone services  87,436    89,504   91,526
Intra–zone telephone services  17,171    19,634   22,439
Domestic long–distance/International  long–distance telephone services  17,101    20,562   24,236
Interconnection and traffic transit services  24,864    21,991   20,444
 (excluding Internet)    
Mobile communication services  38,902    41,161   40,660
Rent of channels  9,486    11,433   10,782
Broadband Internet  55,938    51,619   47,984
Pay TV  11,906    9,208   6,748
Data services (VPN, data centres, wholesale Internet sales)  23,025    20,872   19,227
Cloud computing services  5,422    6,004   2,764
Other  34,453    40,447   25,520
Total revenue  325,704    332,435   312,330

In 2013, 2012 and 2011 the Group generated revenue by the following major customer groups:


Customer Groups 2013 2012 2011
Residential customers  165,884    167,330   170,373
Corporate customers  73,827    70,794   72,437
Governmental customers  45,604    54,159   35,212
Interconnected operators  40,389    40,152   34,308
Total  325,704    332,435   312,330