Missing May 2020 in NYC Weekly Patterns?

I downloaded Weekly Patterns data for New York, NY. I want to look at 2020.

But, when I loaded the data into RStudio and looked at the start dates in my dataset, I see that many weeks are missing. Please see attached screenshot. The second column shows a summary of how many rows there are with each start date – you can see that there are no rows for many weeks.
Screen Shot 2022-05-04 at 4.17.08 PM