data.frame of 100 percentiles and means (about 100 rows) in the USA overall, across all locations (e.g., block groups in blockgroupstats) for a set of indicators such as percent low income. Each column is one indicator (or specifies the percentile).
This should be similar to the lookup tables in the gdb on the FTP site of EJScreen, except it also has data for additional population subgroups.
For details on how the table was made, see source package files EJAM/data-raw/datacreate_usastats2.32_add_dsubgroups.R and EJAM/data-raw/datacreate_usastats2.32.R
See also statestats