National vs. Oklahoma Public Library Materials Expenditures, 2006-2020 [Data set]

This dataset contains aggregated data for fiscal years 2006-2020 from the Institute of Museum and Library Services' annual public library survey. This transformed version of the data contains aggregated data by material type for all public libraries in the nation, as well as an additional subset of the data for aggregated data by material type for Oklahoma's public libraries. Column headers include: Year, Print Materials, Electronic Materials, Other Materials, and Total. Material categories represent: material expenditures for physical materials (books, current serial subscriptions, government documents, and any other print acquisitions), electronic materials (ebooks, e-serials, government documents, databases, electronic files, reference tools, scores, maps, or pictures, including materials digitized by the library), and other materials (microform, audio, video, DVD, and new formats). These values were directly pulled from corresponding datasets for each public library from the PRMATEXP, ELMATEXP, and OTHMATEX columns, representing physical, electronic, and other material expenditures, respectively. Negative and zero values (-3, -1, 0) were excluded from categorical tallies, with -3 values representing closed or temporarily closed administrative entities. No explanation for -1 or 0 values was present in IMLS documentation. Valued were tallied by column after negative and zero values were excluded, with final tallies for each data column included in the attached dataset. Lastly, annually tallied were summed by each year in both National and State datasets. Two sets of the data are available: One set with two tabs (one each for National and State spending) in an Excel format, and two separate files (one each for National and State spending) in a CSV format. Link to dataset in Harvard Dataverse: https://doi.org/10.7910/DVN/5ANJTD

本数据集包含美国博物馆与图书馆服务协会（Institute of Museum and Library Services, IMLS）2006至2020财年的年度公共图书馆调查汇总数据。本数据集的经过处理版本涵盖全美所有公共图书馆按资源类型划分的汇总数据，同时包含俄克拉荷马州公共图书馆按资源类型划分的汇总数据子集。数据集列标题包括：年份、印刷型资源、电子资源、其他资源及总计。各类资源的统计口径如下：印刷型资源支出涵盖实体馆藏（图书、当期期刊订阅、政府文献及其他印刷类馆藏采购）；电子资源支出包含电子书、电子期刊、政府文献、数据库、电子文件、参考工具、乐谱、地图或图片，亦包括图书馆自行数字化加工的馆藏资源；其他资源则包括缩微胶卷、音频制品、视频制品、DVD及新兴格式载体。上述数值直接取自各公共图书馆对应数据集的PRMATEXP、ELMATEXP与OTHMATEX列，分别对应实体资源、电子资源及其他资源的支出。分类统计时已剔除负值与零值（-3、-1、0），其中-3代表已关闭或临时关闭的管理实体，美国博物馆与图书馆服务协会的官方文档未对-1与0值作出解释。在剔除异常值后，按列完成统计工作，各数据列的最终汇总结果已纳入本数据集。此外，国家级与州级数据集均按年度完成求和汇总。本数据集提供两种获取格式：一种为Excel格式，包含两个工作表（分别对应国家级与州级资源支出数据）；另一种为两个独立的CSV文件（分别对应国家级与州级资源支出数据）。数据集在哈佛数据文库（Harvard Dataverse）的链接为：https://doi.org/10.7910/DVN/5ANJTD