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1 For data quality issues see Data Quality Issues (Appendix) which is found on the Explanatory Notes tab of Overseas Arrivals and Departures (cat. no. 3401.0).

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 (e.g. Total). Breaks currently included in the trend series are as follows:-

• October 2002: Short-term resident departures – Indonesia, Total South-east Asia and Total - Trend series breaks due to the decrease in movements resulting from the Bali bombing of 12 October 2002.
• December 2003: Short-term resident departures - Indonesia, Total South-east Asia and Total - Trend series breaks due to a return to the trend levels experienced prior to the Bali bombing of 12 October 2002.
• October 2005: Short-term resident departures - Indonesia, Total South-east Asia and Total - Trend series breaks due to the decrease in movements resulting from the Bali bombing of 1 October 2005.

In June 2006 the Department of Immigration and Multicultural Affairs (DIMA) advised that some passenger cards predominantly from Adelaide airport were not processed in time for the October 2005 Overseas Arrivals and Departures data cut off date. The October 2005 data has been reprocessed to include the missing records (approximately 7,800) and revised data has been published in these spreadsheets.

Differences between the revised October 2005 data and the figures published in the October 2005 issue of this publication were spread across all categories of movement and all variables. A breakdown of the numeric differences by category of movement, is available in Data Quality Issues (Appendix), table A5, from the Explanatory Notes tab of Overseas Arrivals and Departures (cat. no. 3401.0).

The trend break introduced for October 2005 due to the Bali bombing in that month has been retained (see item 3 above for more detail).