Projections Dataset and Methodology

(CTPP). The CTPP provides the number of households by ten (10) income categories and four (4) household sizes.
The CTPP data for all jurisdictions in the region is shown in Exhibit 5 below.
Exhibit 5: 2000 CTPP Households by Household Income by Household Size
Income Category
(1999 Dollars) 1-Person 2-Person 3-Person 4-Or-More All Households
Less Than $10,000 2,000 645 340 380 3,365
$10,000-$14,999 1,730 760 390 244 3,124
$15,000-$29,999 4,485 3,545 1,675 1,915 11,620
$30,000-$39,999 2,460 3,215 1,540 2,195 9,410
$40,000-$49,999 1,675 2,895 1,485 2,465 8,520
$50,000-$59,999 1,030 2,905 1,795 3,080 8,810
$60,000-$74,999 1,020 3,590 2,655 4,435 11,700
$75,000-$99,999 550 4,300 3,285 5,730 13,865
$100,000-$124,999 165 2,150 1,615 2,620 6,550
$125,000 Or More 254 2,185 1,445 2,700 6,584
Totals 15,369 26,190 16,225 25,764 83,548
Since FAMPO indicated that the household income data should be in 2010 dollars, the CTPP data needed to be
adjusted from 1999 dollars to 2010 dollars before it could be used as a benchmark. There are two options for
making this adjustment. One option is to adjust the income ranges so they reflect 2010 dollar values. For example,
using the U.S. Price (CPI-U, Annual Average) 1999 to 2010 inflation rate of 31.5%, the first income category shown in
Exhibit 5 would be “Less Than $7,605” and the last category would be “$95,057 Or More”. The distribution of
households by household size in each category using this option would not change. The second option is to keep
the income categories the same as provided in the CTPP but adjust the number of households under each range.
This will cause the number of households in each category to shift. This was the option used.
Exhibit 6 shows the distribution of the CTPP data using the same income categories but in 2010 dollars. Note that
the totals may be slightly different than Exhibit 5 due to rounding. The data in Exhibit 6 is for the entire region but
the same process was performed for each jurisdiction.
Exhibit 6: Adjusted 2000 CTPP Households by Household Income by Household Size
Income Category
(2010 Dollars) 1-Person 2-Person 3-Person 4-Or-More All Households
Less Than $10,000 1,521 490 259 289 2,559
$10,000-$14,999 966 368 191 160 1,685
$15,000-$29,999 3,579 2,393 1,153 1,173 8,298
$30,000-$39,999 2,251 1,832 867 1,009 5,959
$40,000-$49,999 1,871 2,445 1,171 1,669 7,156
$50,000-$59,999 1,429 2,264 1,140 1,821 6,654
$60,000-$74,999 1,457 3,309 1,912 3,244 9,922
$75,000-$99,999 1,348 4,631 3,325 5,588 14,892
$100,000-$124,999 418 3,270 2,498 4,357 10,544
$125,000 Or More 528 5,185 3,709 6,453 15,875
Totals 15,368 26,189 16,224 25,763 83,543
The next step is to identify a source that can be used to help forecast the number of households by household
income. In this case W&P was used since it has eleven (11) income categories and projections out to the year 2040.
FAMPO 2040 Long-Range Transportation Plan: Socio-Economic Data Element 39