Modeling Illicit Drug Use Dynamics and Its Optimal Control Analysis

Table 6

Recorded prevalence of illicit drug use for Mpumalanga, South Africa.

Year	96b	97a	97b	98a	98b	99a	99b	00a	00b	01a	01b	02a
%	—	—	—	—	—	24	24	29	23	30	31	29
Year	02b	03a	03b	04a	04b	05a	05b	06a	06b	07a	07b	08a
%	32	30.9	38.9	36.2	39.2	44.4	45.7	45.5	52.7	56.3	56.7	60.4