Four years after the last population census, the Guyana Statistical Bureau has not yet published the final results of the 2012 Census. Those final results would provide an ethnic breakdown of the population. Let's examine the numbers of previous censuses and we shall see a trend. These numbers are culled from the 2002 Guyana Census Report and UN Demographic Yearbooks.
EAST INDIANS: 394,417 in 1980; 351,939 in 1991; 326,277 in 2002. The number of Indians decreased steadily from 1980 to 2002 by 68,140. This is a large drop and the 2012 Census should show a similar trend.
BLACKS/AFRICANS: 234,094 in 1980; 233,465 in 1991; 227,062 in 2002. The number of Blacks/Africans decreased steadily from 1980 to 2002 by 7,032. This is a small drop and the 2012 Census should show a similar trend.
AMERINDIANS: 40,343 in 1980; 46,722 in 1991; 68,675 in 2002. The number of Amerindians increased steadily from 1980 to 2002 by 28,332. This is a big increase and the 2012 Census should show a similar trend.
MIXED: 84,764 in 1980; 87,881 in 1991; 125,727 in 2002. The number of Mixed Guyanese increased steadily from 1980 to 2002 by 40,963. This is also a big increase and the 2012 Census should show a similar trend.
From these trends it is clear that the PPP cannot win the 2020 general elections with East Indian votes alone. Bear in mind that not all Indians vote PPP. Also, with the general anti-black sentiments swirling in Guyana, GNI Political Forum, Facebook, etc the PPP will not attract substantial Black/African votes. And, as my friend Caribj says repeatedly, most Mixed Guyanese don't vote PPP. As for Amerindian votes, APNU+AFC as the incumbent will get the majority as Caribj also says.