According to Rickford (1987: 41) citing Baber and Jeffrey (1986: 47), the estimated population of Guyana in 1980 stood at 758,000.
Facts about Guyana:
-Population: 770,794 (July 2008 est.)
http://worldfacts.us/Guyana.htm
It is estimated that there might be as many Guyanese living outside of Guyana as within it, mainly in North America, the UK and Suriname. When added to the Creolese speaking population of Guyana, the number of speakers of Creolese would have to be in excess of 1 million, but less than 2 million.