inc

var spanGroupData = [ {"timestamp": 1535785200, "group": [ {"author_id": 0, "token_count": 1373}, ]}, {"timestamp": 1543651200, "group": [ {"author_id": 0, "token_count": 52}, ]}, {"timestamp": 1554102000, "group": [ {"author_id": 0, "token_count": 113}, {"author_id": 1, "token_count": 7}, ]}, {"timestamp": 1559372400, "group": [ {"author_id": 0, "token_count": 12}, ]}, {"timestamp": 1564642800, "group": [ {"author_id": 0, "token_count": 118}, ]}, {"timestamp": 1575187200, "group": [ {"author_id": 0, "token_count": 32}, ]}, {"timestamp": 1577865600, "group": [ {"author_id": 0, "token_count": 18}, ]}, {"timestamp": 1583049600, "group": [ {"author_id": 0, "token_count": 2}, ]}, {"timestamp": 1585724400, "group": [ {"author_id": 2, "token_count": 2}, ]}, ]