| co2_ml | Monthly CO2 records taken at Mauna Loa, since March 1958 |
| covid_vac | Rates of COVID-19 Cases and Deaths by Vaccination Status |
| female_leaders | Female leaders of independent states. |
| geom_lexis | Lexis charts |
| geom_pointless | Emphasize some observations with points |
| stat_lexis | Lexis charts |
| stat_pointless | Emphasize some observations with points |