Source data settings: worldwide, all categories, web search
To achieve a smooth chart, uploader used 24-month averaging, and (for the thick solid line) excluded from the original data apparently-anomalous datapoints for April 2022 ("100"), and April 2023 ("49"). Possibly, these values related to Earth Day-related searches. Anomalousness for Versions 4+ was judged as a single month's data being more than 2.5 times higher than next largest other data points.
Version 3 added a thin dotted line based on data including the apparently-anomalous values.
Version 4 reduced the number of excluded data points from 3 to 2 for the thick solid line.
Technical note: most SVG code was automatically generated by the "line charts" and "Scatterplots" spreadsheets linked at User:RCraig09/Excel to XML for SVG. Minor additions and adjustments were made in a text editor.
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