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. 2020 Feb 21;6(2):e03452. doi: 10.1016/j.heliyon.2020.e03452

Table 2.

Sample distribution.

Year Number of firms with RC Number of firms without RC Total
2014 39 154 193
2015 108 164 272
2016 123 133 256
2017
 76
 50
 126
Total 346 501 847