{"found": true, "county": {"County_Seat": "Des Moines", "Year_Founded": "1846 ", "Land_Area": "572", "Population_Level": "492,401", "Population_Density": "861", "County_Government_Type": " County", "Governing_Authority": "Home Rule", "Governing_Body": "Board of Supervisors", "Board_Size": 5, "Full_Address": "111 Court Ave<br>County Administrative Office Bldg.<br>Des Moines, IA 50309-2218", "County_Website": "https://www.polkcountyiowa.gov/", "County_Pop_25_64_Age": "53.32%", "County_Pop_Over_65_Age": "13.06%", "County_Labor_Force": "264,807", "County_Unemployment_Rate": "6.00%", "County_GDP": "$38.10 B", "Population_Change": "14.34%", "Housing_Units": "210,184", "Pct_Housing_Units": "93.68%"}, "pop": {"1920": 154029, "1930": 172837, "1940": 195835, "1950": 226010, "1960": 266315, "1970": 286101, "1980": 303170, "1990": 327140, "2000": 374258, "2020": 492401, "2010": 430640}}