How Long Does Rabipur Immunization Last ?

I am Nandakumar from India, I ve taken 5 doses of Rabipur shots during July 2010, since i ve bitten by my pet dog last year. However the Dog was doing well & Healthy at present. Also I had taken a One shot of Rabipur booster last week due in which i had a contact while i washing my pet s wound (The contact is not wound-to-wound)& also i am not sure whether my pet is bitten by rabies infected animals, but my dog is doing well for the past 1 week, nothing observered severe & she is normal ask like as.. In this case. Please advice me ,does the immunisation will last till now. Also tell me how long the immunisation last long for this case. Or do i need to still continue with Rabipur doses. Thanks in advance....