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<br />B-3 <br />Personal Income. The table below summarizes the total effective buying income and the <br />median household effective buying income for 2017 through 2021. <br /> <br />Personal Income <br />As of January 1 <br /> <br /> Total Effective <br />Buying Income <br />Median Household Effective <br />Buying Income <br /> <br />ALAMEDA COUNTY <br />2017 $56,091,066 $67,631 <br />2018 61,987,949 73,633 <br />2019 67,609,653 79,446 <br />2020 72,243,436 84,435 <br />2021 77,794,202 88,389 <br /> <br />CONTRA COSTA COUNTY <br />2017 $39,248,375 $69,967 <br />2018 42,543,271 74,398 <br />2019 46,121,254 79,603 <br />2020 48,775,464 83,242 <br />2021 51,959,070 87,804 <br /> <br /> <br /> <br />Source: The Nielsen Company (US), Inc for years 2017 and 2018; Claritas, LLC for 2019 through 2021.