SEASONALLY ADJUSTED AND TREND ESTIMATES
INTRODUCTION
Seasonally adjusted and trend estimates add to the understanding of overseas arrivals and departures (OAD) statistics. Seasonally adjusted estimates allow users to analyse short-term movements including irregular impacts on the series, while trend estimates provide a better method to analyse and monitor the underlying direction of the short-term movement series. In most cases the trend series is the best source of information on the long-term direction of these statistics.
SHORT-TERM VISITOR ARRIVALS
Selected source countries
The graph for the United States of America shows the large increase in the seasonally adjusted series for short-term visitor arrivals in September 2000, during the Olympic Games in Sydney. For Korea the graph shows the severe fall in arrivals in 1997-98, associated with the Asian financial crisis, and subsequent strong and continuous overall growth. The graph for Japan shows the significant impact of Severe Acute Respiratory Syndrome (SARS) on the seasonally adjusted arrivals series in mid-2003.
United States of America
Korea
Japan
SHORT-TERM RESIDENT DEPARTURES
Selected destinations
For residents departing to the United States of America the graph illustrates the effect of the 11 September 2001 terrorist attacks in that country on short-term departures of Australian residents to the United States of America. The graph for Germany shows, in the seasonally adjusted series, the effect of Germany hosting the 2006 FIFA World Cup (9 June to 9 July). For Indonesia the graph shows the impact of the 12 October 2002 Bali bombing and the reduced level of travel experienced in the next twelve months. The effect of the 1 October 2005 Bali bombing is also evident and another break in the trend series was introduced. Monitoring of recent movements indicates that the trend series for Indonesia is again experiencing strong growth.
United States of America
Germany
Indonesia