Sorting Wisconsin counties by best vaccination rate

CovidVaccinationBestCounties.rb

# https://www.dhs.wisconsin.gov/covid-19/data.htm#summary

require 'csv'
data = CSV.read("/home/lafrance/Downloads/COVID-19_Vaccination_Data_by_County.csv")

counties = {}

for line in data do
    county = line[1]
    onedose = line[3]
    fullvax = line[4]
    pop = line[5]
    pct_full = fullvax.to_f / pop.to_f * 100
    #puts "#{county} has pop #{pop}, one dose #{onedose}, #{fullvax} fully, #{pct_full}%"
    counties[county] = pct_full if !pct_full.nan?
end

counties.sort_by{|k,v|v}.each do |k,v|
    puts "#{k} is #{v}% fully vaccinated"
end

output.txt

TAYLOR is 32.01101115862951% fully vaccinated
CLARK is 33.71484442399494% fully vaccinated
RUSK is 38.23529411764706% fully vaccinated
WAUSHARA is 41.04651638505912% fully vaccinated
SHAWANO is 42.683195188146414% fully vaccinated
DUNN is 44.7650326221125% fully vaccinated
GRANT is 45.11168568595812% fully vaccinated
MONROE is 45.11707348712516% fully vaccinated
JACKSON is 45.36646805212421% fully vaccinated
DODGE is 46.06837509534489% fully vaccinated
JUNEAU is 46.32967362386181% fully vaccinated
FOREST is 46.66814749000444% fully vaccinated
FLORENCE is 46.79860302677532% fully vaccinated
MARINETTE is 47.01610904584882% fully vaccinated
KEWAUNEE is 47.171381031613976% fully vaccinated
WALWORTH is 47.24939346093118% fully vaccinated
MARQUETTE is 47.95171439578785% fully vaccinated
OCONTO is 48.154495122594255% fully vaccinated
PEPIN is 48.414985590778095% fully vaccinated
LANGLADE is 48.4548439209964% fully vaccinated
ADAMS is 48.84272997032641% fully vaccinated
FOND DU LAC is 49.177490014796476% fully vaccinated
PIERCE is 49.44800486504187% fully vaccinated
WAUPACA is 49.49597960384389% fully vaccinated
BARRON is 49.644151710724074% fully vaccinated
KENOSHA is 50.00029487912905% fully vaccinated
VERNON is 50.00324443579262% fully vaccinated
LINCOLN is 50.09966295799659% fully vaccinated
BURNETT is 50.31789282470481% fully vaccinated
POLK is 50.581275837653884% fully vaccinated
JEFFERSON is 50.7508641130602% fully vaccinated
WASHINGTON is 50.809356484408305% fully vaccinated
GREEN LAKE is 50.86977211441865% fully vaccinated
CALUMET is 50.953303120445604% fully vaccinated
MARATHON is 51.8210358753648% fully vaccinated
LAFAYETTE is 51.857185718571856% fully vaccinated
CHIPPEWA is 52.041510717931274% fully vaccinated
CRAWFORD is 52.10464323352551% fully vaccinated
SAWYER is 52.30704191327455% fully vaccinated
PORTAGE is 52.46990335160798% fully vaccinated
PRICE is 52.6477417421916% fully vaccinated
WOOD is 52.72400991794408% fully vaccinated
RACINE is 53.06681744782513% fully vaccinated
MANITOWOC is 53.748369861105836% fully vaccinated
RICHLAND is 53.88360769765824% fully vaccinated
MILWAUKEE is 54.41121424175712% fully vaccinated
WINNEBAGO is 54.513777798460794% fully vaccinated
ROCK is 54.82694026470119% fully vaccinated
SHEBOYGAN is 54.89509276920409% fully vaccinated
ST CROIX is 55.568052752875275% fully vaccinated
BUFFALO is 55.92049727572711% fully vaccinated
EAU CLAIRE is 56.362402767425415% fully vaccinated
OUTAGAMIE is 56.533517843361636% fully vaccinated
SAUK is 57.20027311380777% fully vaccinated
BROWN is 57.283909549334325% fully vaccinated
GREEN is 57.37554112554113% fully vaccinated
IRON is 58.044663267100404% fully vaccinated
DOUGLAS is 58.669756662804176% fully vaccinated
VILAS is 59.0358188781257% fully vaccinated
WASHBURN is 59.38295165394402% fully vaccinated
ONEIDA is 59.480264082034% fully vaccinated
COLUMBIA is 59.85190850309393% fully vaccinated
WAUKESHA is 60.67174998391878% fully vaccinated
TREMPEALEAU is 61.20611150460387% fully vaccinated
ASHLAND is 61.34172985477445% fully vaccinated
LA CROSSE is 61.51369305856833% fully vaccinated
OZAUKEE is 62.39674516089262% fully vaccinated
IOWA is 62.615085733592366% fully vaccinated
BAYFIELD is 66.13461026868848% fully vaccinated
MENOMINEE is 68.8542581211589% fully vaccinated
DOOR is 70.87248807286396% fully vaccinated
DANE is 72.47002441946606% fully vaccinated