[wierdstuff]

The file labeled 2019 contains 22,502 rows and the fiscal 2019 year is not yet complete. The file labeled 2018 is the one that contains 55,667 rows.

[raincom]

Well, right now (April 3, 2019), USCIS is accepting applications for 2020. Just decrement by 1 to get the calendar year.

[econdataus]

They may be accepting applications for 2020 but some subset won't be approved until they have the lottery. Also, it may take some time to update the file. The 2019 file will grow larger. Ignore it for now.