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Table 2 The relevant data from the CLHLS

From: Subsidy policy selection of elderly care service projects under uncertain actual demand: a real options analysis based on China’s experience

Year (∆y ≈ 3) Total valid samples Living in nursing homes Proportion (% → Qt) ωi  (n = 8) \({\left({\omega}_i-\overline{\omega}\right)}^2\)
1998 9093 457 5.03 _ _
2000 11,199 784 7.00 0.39 0.14
2002 16,064 740 4.61 −0.34 0.13
2005 15,638 422 2.70 −0.41 0.19
2008 16,954 308 1.82 −0.33 0.12
2011 9638 207 2.15 0.18 0.03
2014 7020 198 2.82 0.31 0.09
2018 15,549 574 3.69 0.31 0.09