The total number of reviews published each month in games-needing-reviews.
The spread of scores for reviews published in games-needing-reviews.
The proportion of games released this year that are ranked or unranked. To be ranked, a game must have 3 reviews on the site.
This shows how many games have received e.g. 3 reviews, or 4 reviews, or 5 reviews, etc. A lot of games have a small number of reviews.