dear danyal .... i am a resident of punjab , and situation here is also not very different
...the most authentic source for updated figures i'm having for the time being is; books for commercial geography (intermediate) by prof . mian mohammad ,,,,there are statistical figures based on the data taken from different sources , as latter as 2003/04....and i'm sure most of the people must be facing the same problem regarding the latest figures,,,try to search for commerce books for intermediate/bachelors etc....
i tink they should be available from urdu bazar khi...most prominent writers in this respect are
1; prof saeed ahmed siddiqui (esp his book "Economic Geography of the wrold"(commerce publications khi))
2;prof mirza mohammad munawar ; some of his books are "geography of south asia","commercial geography"etc
3;"comprehensive geography" by m. jahangir sanpal, this book gives you a superficial insight into all the topics given in css course outline....
as for weblinks ,
1; "www.nationmaster.com" is a reliable sourse for latest figuers
2; answers.com might also prove to be valuable sourse for you
best of luck