I have 10 years worth of data (surveillance data so its weighted). I want to assess the trend of the proportion of people from each year who have a certain medication over the 10 year period. What is the best method to use? So far I used 1) Proportions for each year and used scatter plot to fit a line 2) linear regression svy: regress med_x year .3) I found a similar paper that used weighted poisson with age standardized estimates but couldn't figure out how to code this. Thank you for your help.