year	gross_income_€	single_males	single_males_total_gross_income_€m	single_females	single_females_total_gross_income_€m	married_couples_both_earning	married_couples_both_earning_total_gross_income_€m	married_couples_one_earning	married_couples_one_earning_total_gross_income_€m	widowers	widowers_total_gross_income_€m	widows	widows_total_gross_income_€m	all_taxpayers	all_taxpayers_total_gross_income_€m