| 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | |
| Initial Total Firms | 146 | 150 | 158 | 163 | 169 | 171 | 176 | 188 | 200 | 204 | 207 |
| Less: Financial Firms | −10 | −10 | −10 | −10 | −11 | −11 | −11 | −11 | −11 | −11 | −11 |
| Less: Insurance Firms | −27 | −28 | −29 | −30 | −30 | −30 | −30 | −30 | −30 | −30 | −29 |
| Less: REITs | 0 | 0 | 0 | 0 | −1 | −2 | −1 | −7 | −16 | −17 | −17 |
| Total Eligible Firms | 109 | 112 | 119 | 123 | 127 | 128 | 134 | 140 | 143 | 146 | 150 |
| Firms Selected | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 |
| % Age of Selected to Total Eligible | 12.84% | 12.50% | 11.76% | 11.38% | 11.02% | 10.94% | 10.45% | 10.0% | 9.79% | 9.59% | 9.33% |