An enumeration district over an eight-month period has experienced 3 residential burglaries. The enumeration district has 200 households (sourced from the last Census). A rate of the number of burglaries per 1000 households per annum can be calculated from,

((12/A) * B) * 1000/C

A = 8

B = 3

C = 200

((12/8) * 3) * 1000/200

= (4.5) * 5