Years	Parameter	Food	Clothes	Live	Daily necessities and services	Traffic communication	Education, culture and Entertainment	Medical insurance	Other supplies and services
2014	$a_{i}$	1929.525	0	0	111.478	−170.625	763.48	190.622	100.643
	$b_{i}$	0.167	0.026	0.151	0.04	0.1	0.017	0.04	0.011
	R²	0.99	0.981	0.965	0.99	0.998	0.732	0.961	0.994
2015	$a_{i}$	2276.174	92.429	1013.769	236.131	0	635.788	294.195	75.15
	$b_{i}$	0.167	0.021	0.111	0.031	0.09	0.024	0.032	0.012
	R²	0.993	0.981	0.98	0.974	0.955	0.817	0.963	0.95
2016	$a_{i}$	2743.126	127.933	1421.485	177.445	0	567.404	352.205	76.058
	$b_{i}$	0.156	0.02	0.093	0.037	0.095	0.035	0.031	0.014
	R²	0.975	0.988	0.982	0.993	0.967	0.768	0.891	0.924
2017	$a_{i}$	2680.291	136.271	1500.394	235.241	0	757.409	472.743	0
	$b_{i}$	0.167	0.021	0.089	0.031	0.093	0.027	0.028	0.013
	R²	0.986	0.987	0.967	0.991	0.979	0.856	0.891	0.932