load European percentage of renewables data for all years

Currently in `data/postgres` I'm able to load the 2019 share of renewables for European data:
```
npm run dataLoader load_emissions_factors 2019-RES_proxies_EEA.csv -- --format eea_res_proxies --source https://www.eea.europa.eu/data-and-maps/data/approximated-estimates-for-the-share-4
```

The data loader needs to be fixed for the others.