How frequent do people blog ?

I realize that lately , the number of people around me who hasn't been regularly blogging has gone up. Why is that the case ? Is it due to hectic worklife ? Lack of discipline ? Shift of interest ?

That naturally leads me to the question , why do people Blog in the 1st place ?

1)As a biography to chronologies their own life what they eat , what they look like, what they do blah blah blah.

2)As a storefront to hawk their wares. Their dresses , their blah blah blah .

3)As a point of news , people deliver what they See , Hear , Touch , Taste , Feel about things around them . See accidents , Hear rumours , Touch whatever , Food they taste , things they feel .

4)To propagate their political agenda. Be it in national affairs , in games etc.

Why do they start a blog as opposed to alternatives ?
Probably bcos blogging is cheap to use , costing only the time it takes to blog.
Then there is twitter. But i will safe that for another week ( @leechenghao btw)

So why do i stop blogging for sometime ? cos maybe there is no new content to update ? There is no significant change other then growing perpetually fat. Partially it was due to lack of discipline , but largely the dearth of new ideas to entertain readers and log about my own boring life.