Cedar writes on his blog that
"After listening to the above statement, publishers would be forgiven for assuming that more than 13,000 new Kingdom Halls are needed each year to keep pace with publisher growth.
However, when you compare the number of congregations in 2013 (113,823) with the number of congregations the year before (111,719), you note that there has been an increase of only 2,104 congregations worldwide – some of which will be sharing existing kingdom hall infrastructure. The 13,000 figure is therefore either a gross exaggeration, or kingdom halls are being refurbished and rebuilt at an astonishing rate – faster than is actually required."
Nowhere does it say that 13,000 are needed annually - it states that 13,000 are planned and/or under construction right now. Further, Cedar seems to think that each congregation has its own KH. It doesn't, and particularly so in 3rd world countries. So whatever one might think of Cedar's blog - the lines quoted above are totally misplaced.