G  -  Low noise applied to cell value (less than 2%)
H  -  Medium noise applied to cell value (2% or more but less than 5%)
J   -   High noise applied to cell value (greater than or equal to 5%) *prior to 2015, ‘J’          flag cell values were suppressed with ‘D’.
D  -  Data withheld and value set to 0 to avoid disclosing information of individual          businesses; data are included in higher level totals. *starting with 2017, ‘D’          replaced with ‘S’.
S  -   Data withheld and value set to 0 to avoid releasing information that does not          meet publication standards; data are included in higher level totals