The annual hours worked indicator is one of the most widely cited indicators provided by the OECD. The Factbook's comparability note says that "The data are intended for comparisons of trends over time and not yet suitable for inter-country comparisons." This warning is usually ignored. In its original form in the data annex to the annual OECD Employment Outlook, this table includes a warning about comparing levels as well as a great deal of country-by-country notes that assist the data user in assessing comparability among different countries. For example, data for the Netherlands exclude overtime hours--helping to explain the relatively low annual hours for this country. These notes could be attached to the tables in the Internet version of this table. An alternative to the chart for this indicator that is more consistent with the comparability note in the Factbook would be to chart the change in hours worked from 1990 to 2003 for each country rather than the 2003 level for each country."