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2 Short-term movements are based on a sample and are subject to sampling error. See paragraphs 10 and 11 of the Explanatory Notes and the Standard Errors section from the Explanatory Notes tab of Overseas Arrivals and Departures (cat. no. 3401.0) for more detail.
3 Occasionally situations occur that necessitate breaks being applied to the trend series. These breaks are necessary because of a change in the underlying level of the original series. While the breaks apply to an individual country (e.g. Indonesia) a consequence is that breaks are also applied to the regional total series (e.g. Total South-East Asia) and the total series. Breaks currently included in the trend series are as follows:
4 For additional notes on the data please see the Notes section of the Main Features of Overseas Arrivals and Departures (cat. no. 3401.0).
Annual seasonal adjustment reanalysis: The seasonally adjusted and trend series have been updated following the annual review of the seasonal adjustment process. This review provides an opportunity to confirm the extent to which movements are affected by seasonal or irregular influences. As a result, the seasonally adjusted and trend estimates of a number of series have been revised.
Introduction of ARIMA modelling techniques: From this issue the ABS has implemented improved methods of producing seasonally adjusted estimates, focused on the application of Autoregressive Integrated Moving Average (ARIMA) modelling techniques. See paragraph 19 of the Explanatory Notes for more detail.
Original series: While revisions were made to both the seasonally adjusted and trend series, no revisions were made to the previously published original series.