Table 1.

Frequencies of transaction types used within the study

Transaction type	Count	Proportion
All transactions	639,979,438	1.0
All tap-in transactions	181,662,481	0.28
All tap-out transactions	180,132,354	0.28
All bus transactions	276,474,597	0.43

Note that in the rest of this paper we will refer to volumes which number in the millions in shorthand form as 639.979 m or round the data up or down to integer millions