When exporting blood pressure data to CSV there should not be any aggregation even if the time period is 1 year.
Currently when the time period is 1 year the data is weekly aggregated and the individual measurements are lost. The only way around would be to perform ~12 x 4 wk exports per year of data.
Considiring that even in extreme cases there won't be more than around 400 measurements per year this seems an overly cautious aggregation.