yob2015, yob2016 are raw data of names, gender, amount of kids named that
itsgirl.csv top 10 girl names of 2015/2016
y2015, y2016 are cleaned dataframes of the raw data total is the combined dataframe of y2015, y2016
mTotal and fTotal are separated by gender versions of total
girl is just the top 10 girl names of 2015/2016, a data frame eventually written to itsagirl.csv