The numbers to be honest are a little off. 12% was in 2006. Now they are claiming 50-60%. I can find you link. But generally it should be easy. Get all KPLC customers and get number of household we have in kenya. Electricity supply is measure per household. Assuming 4-5 people per household and projected pop of 45m - we are talking 9-11M HH - so if KPLC have 4.5-6M customers in KPLC - then that is about half. Last I saw was 3m customers --- but alot they say has changed - I think they've added 1M customers since Jubilee came on.
The big jump (100,000 per annum first) was achieved by Manitoba/Canadian guys who ran KPLC for 1-2 yrs and Nyachae reforms (allowing private contractors to connect people) way back in 2006- then numbers accelerated to 200 - then 350--then plataue - and this last Mile has injected some momentum - with aim of connecting extra 350K in phase 1 and about the same in phase 2.
The big problem of course is that power consumption growth is very minimal - lighting houses doesn't use lots of power - it industries that consume power - one cement factory can consume 100mw - while 1M people will struggle with that.
12% might be closer to 20 years ago. 60% seems low. Where can I get the 2015 numbers?