Table 2.

ECSSOS data quality control flagging system.

Quality Flag	Description
1	Good data, passed all tests.
2	Data quality control procedures are not performed.
3	Suspect data, failed the ARIMA model-based test.
4	Bad data, failed the range rationality test.
5	Stuck value data.
7	Interpolated single data point by the ARIMA method.
8	Interpolated successive multi data points by the ARIMA method.
9	Missing data.