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households and 17% in the County). However, while Louisville has a relatively high share of high <br />earning households, 30% of Louisville households earn less than $75,000 annually. <br />Exhibit 8: Median Household Income Distribution, Louisville and Boulder County, 2021 <br />Source: ACS 5-Year Data Tables, 2017-2021 <br />50% <br />40% <br />30% 26% <br />20% 14% 11% 14% 11% 14% 10% 12/0 0 11% 10% g% 8% 12/o 15% o 17% <br />10% 8% <br />0% <br />< $25k $25k - $50k - $75k - $100k- $125k- $150k- $200k+ <br />$50k $75k $100k $125k $150k $200k <br />Louisville Boulder County <br />Exhibit 9 shows the change in the share of households in each income bracket from 2011 to 2021. <br />For example, the share of Louisville households earning less than $25,000 annually decreased by <br />4% between 2011 and 2021. Notably, Louisville experienced a substantial increase in the share of <br />households earning greater than $200,000 annually (a 17% increase). At the same time, the <br />number of households earning less than $100,000 decreased by about 20% in Louisville. <br />Exhibit 9: Change in Median Household Income Distribution, Louisville and Boulder County, 2011- <br />2021 <br />Source: ACS 5-Year Data Tables, 2007-2011, 2017-2021 <br />20% 17% <br />10% <br />3% <br />1% <br />0% <br />_0 -3% -2% <br />-10% ° -8% -5% <br />Louisville <br />< $25k $25k - $50k <br />8% <br />1% 1% 4% <br />-5% -7% <br />Boulder County <br />$50k -$75k $75k -$100k <br />■ $100k - $125k ■ $125k - $150k $150k - $200k $200k + <br />The percent of households in all income groups under $150,000 largely declined over the 10-year <br />period, while the number of households earning more than $200,000 annually increased. There <br />are a few possible explanations for this increase. However, with the sharp increase in the number <br />of very high -earning households, it is most likely that the main driver of this increase is wealthier <br />households moving into Louisville. The reduction in households earning less than $100,000 <br />annually could be caused by lower income households moving out of Louisville as housing and <br />other living costs, such as transportation, increase. Louisville also experienced a decrease in cost - <br />burdening (discussed in more detail in more detail below), among owner and renter households, <br />which should not be looked at as an increase in affordability given the degree at which housing <br />costs in Louisville have increased. Rather, the decrease in cost -burdening again points to more <br />lower -income households leaving the area and being replaced by more financially stable and <br />higher -earning households. <br />Louisville Housing Plan Part 2: Housing Needs and Market Assessment 15 <br />