For each request, the average number of doses requested was 1.0 million, with an increasing trend from 0.20 million in 2013 (one request), 0.18 in 2014 (11 requests), 0.26 million in 2015 (15 requests), 0.31 in 2016 (14 requests), 1.07 million in 2017 (28 requests) to 2.4 million in 2018 (41 requests).
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