And people have various reasons for migrating. One such reason is a Mother and Father might've left Guyana in 1984, during the PNC reign of terror and destruction. They would've no doubt left relatives behind. Being now settled and possibly home owners in 2011, they then, in Guyanese parlance, 'put in' for other relatives.
All this contributes to the migration statistics, but it does not say that this family left Guyana because of the country's mismanagement etc.