Part $5$: Total votes per year

We want to answer the question: what year had the highest voter turnout as a fraction of

the population?

Let's count the votes cast in $2020$

Note: Remember that for a dataframe $df,$ we can use

df $.$ loc $[$ column$\_$index$]$ to select all the rows where column$\_$index is

True. From that, we can use the syntax df $.$ loc $[$df $[$ column $]==$value $]$

to filter for the rows where a given column has a given value.

a$.$ Using this syntax for $.$ loc, create a dataframe which only includes rows

from $2020.$ This sub$-$dataframe should have $547$ rows.

b$.$ Get the column corresponding to candidate votes and take its sum. That

sum should be the total number of votes cast in $2020.$

Calculate the vote totals for each year from $1976$ to $2020.$

a$.$ You can do this in one line of code with a particular pandas function. Try

to figure out which function it is$.$

b$.$ If you can't figure it out, use a for loop.