Hello, i have a data showing the list of customers targeted for a specific product for the last year, so each customer in a different month and we have many customers in each month. we offer a product in that month and the customer reply in 1, 2, 3 or 4,... months and maybe he will not respond. we want to plot cummulative percentage of response by month of origination ex: Date of Origination Customr name Month of reply 1/1/2013 Customer 1 January 1/1/2013 Customer 2 March 1/1/2013 Customer 3 February 1/1/2013 Customer 4 January 1/1/2013 Customer 5 June ........... the graph should chows that 2/5 of customer respond in January, 3/5 before February, 4/5 before March, 4/5 before April, ..................... Thanks Michel
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