a `data.frame` with `100` rows and variables `region`, `gender`
and `val`.
Examples
utils::data("microdata1", package ="sdcTable")head(microdata1)#> region gender val#> 1 C male 9#> 2 C male 11#> 3 A male 10#> 4 A male 11#> 5 C male 18#> 6 D female 10