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happened in King County in 1999 and 2000 when overall enrollment in the county declined for <br />two straight years. <br />For the District forecast the cohort survival method is combined with information about market <br />share gains and losses, and information about population growth due to new housing <br />construction. The market share factor reflects the number of students within the District who are <br />likely to enroll in private schools or other school districts. The projection used in this report <br />assumes a loss factor of one-tenth of a percentage point annually for the period of the forecast. <br />The population/housing growth factor reflects the number of new students that are likely to be <br />generated by housing starts within the District's boundaries. The forecasts assume a growth <br />factor of 1.01 for both elementary and secondary students for the period between 2006 and 2011. <br />This number represents additional growth above and beyond what is projected by the cohort <br />survival ratios. <br />Based on this projection methodology headcount enrollment is expected to increase to 14,645 by <br />2011. FTE enrollment is projected to increase to 13,974. Recognizing the uncertainty of the <br />assumptions regarding growth, a higher growth model was also produced which predicts a <br />headcount enrollment of 15,309 and an FTE enrollment of 14,611 by 2011. <br />A projection based on OFM population projections for Snohomish County was also produced. <br />The District's October 2005 FTE enrollment (without the Skills Center) is 13,540. This is 2.06% <br />of the estimated Snohomish County 2005 population of 655,800. Assuming that this percentage <br />remains constant, the District's FTE enrollment would grow to 15,081 FTE by 2011. An <br />additional projection, using Snohomish County provided population data specific to the Mukilteo <br />School District, results in slightly lower projection of 15,031 FTE by October of 2011. It should <br />be noted that both of these estimates are higher than the either the medium or high range District <br />forecast, but they also assume much greater population growth in the Mukilteo school district <br />than has been seen in recent years. <br />A comparison of the FTE projections derived from the different methodologies is provided in <br />Table 7. The table also includes a projection from OSPI that uses a cohort survival <br />methodology. Since the original OSPI projection includes the Skills Center the original numbers <br />had to be adjusted to make them comparable. In order to create comparable numbers, the OSPI <br />headcount forecast was converted to FTE (based on the assumption that FTE was approximately <br />95% of the headcount). The October 2005 FTE enrollment for the Skills Center (approximately <br />750) was then subtracted from each year of the forecast. (This deduction is based on the <br />assumption that the Skills Center FTE would remain constant). This forecast shows the lowest <br />growth trend for the District. It should be remembered, however, that OSPI's kindergarten <br />forecasts are typically linear extrapolations from the current trend and do not consider increases <br />or decreases in the birth trend. For this reason the OSPI forecast is probably underestimating the <br />future growth that is likely due to an increase in the birth cohort. <br />13 <br />