$54$:$04$

Consider the $CO2$ Emissions project. Imagine the $C{O}_2\_$and$\_$Oil dataset is recorded by month instead of by year.

For each observation of a country, there is a column storing the month $($such as January$)$ and a column storing the year $($such as $2012).$

What visual recipe could be used to aggregate the data into yearly totals?

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