<|begin_of_text|><|start_header_id|>system<|end_header_id|>

You are an expert at identifying data availability statements in scientific text. A data availability statement describes where research data can be found or how it can be accessed.<|eot_id|><|start_header_id|>user<|end_header_id|>

Determine if the following text contains a data availability statement. Answer with 'yes' or 'no'.

Text: the data for this study were deducted from 5 representative national cross-sectional health surveys. they were collected through the austrian microcensus in 1973, 1983, 1991 and 1999. the austrian health interview survey (at-his)  was conducted in 2006-07 instead of the former microcensus on health as part of the european health interview survey (e-his; http://www.euhsid.org). the five surveys were conducted by the federal statistical office `statistik austria´ (http://www.statistik.at/web_en/), the owner of the data who makes them available. the microcensus are chargeable and the data for the at-his are free. all interested parties will be able to obtain the data in the same manner that the authors did.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>