From Page 59 > Furthermore, our dollar-based gross retention rate, based on a cohort of all of our customers, has been in the low-to-mid 90% range as of the en

From Page 59 > Furthermore, our dollar-based gross retention rate, based on a cohort of all of our customers, has been in the low-to-mid 90% range as of the end of each of our last eight quarters. > A further indication of the propensity of our customer relationships to expand over time is our dollar-based net retention rate, which compares our ARR from the same set of customers in one period, relative to the year-ago period. As of June 30, 2018 and 2019, our dollar-based net retention rate was 146%, and as of December 31, 2017 and 2018, it was 141% and 151%, respectively. We calculate dollar-based net retention rate as of a period end by starting with the ARR from the cohort of all customers as of 12 months prior to such period-end, or the Prior Period ARR.