Historical Statistics of the United States is an online reference book with dynamic statistical tables. As the name implies, it has broad coverage of statistics on all aspects of the United States that provide historical time-series statistics at the nation level.
Tables are downloadable in Excel or .csv formats. Custom tables may be created by merging columns from multiple tables.
This book is especially valuable for the informative essays that detail the scope and modes of data collection for the different subject areas. This information can be used as a guide to searching for additional statistics and for understanding what data are likely to be available or not.