Rankings over time


## Warning: There was 1 warning in `filter()`.
## ℹ In argument: `Ranking == min(Ranking)`.
## Caused by warning in `min()`:
## ! no non-missing arguments to min; returning Inf
## Warning: There was 1 warning in `filter()`.
## ℹ In argument: `Ranking == max(Ranking)`.
## Caused by warning in `max()`:
## ! no non-missing arguments to max; returning -Inf

Fast facts