stata - incidence calculation

Hi there, would be grateful if someone can help me! i have to calulate the incidence of a disease and I have to do this in stata.

i have : disease column (0,1) - 0 no disease, 1 disease
id no of participants

Please help!!!
Dear WeeG, many thanks, I did have a read through that earlier today but i didn't quite follow. I am new to stata so i dont understand what goes on.
I have a sample of people with and without the disease (0,1). I need to see how this incidence changes over time and also have it weighted against the country's population. I also require to have this then as a graphical representation.