Treated Price Index Data from Cepea, Ipea, and Conab

First stage of treatment: The data was converted to a standardized template. Unnecessary data was deleted, and missing data was added.Second stage of treatment:  data types and units of measure were standardized. 第一阶段数据处理：将数据转换为标准化模板，删除冗余数据并补充缺失值。第二阶段数据处理：统一规范数据类型与度量单位。