message: load 2019 US egrid data by state and NERC region
diff: @@ -133,7 +133,8 @@ $ unzip f8612019.zip
  ```bash
  $ node egrid-data-loader.js load_utility_emissions eGRID2018_Data_v2.xlsx NRL18
  $ node egrid-data-loader.js load_utility_emissions eGRID2018_Data_v2.xlsx ST18
  -$ node egrid-data-loader.js load_utility_emissions egrid2019_data.xlsx US19
  +$ node egrid-data-loader.js load_utility_emissions egrid2019_data.xlsx NRL19
  +$ node egrid-data-loader.js load_utility_emissions egrid2019_data.xlsx ST19
  $ node egrid-data-loader.js load_utility_identifiers Utility_Data_2019.xlsx
  ```
  