年份	x₁	x₂	x₃	x₄	y₁	y₂	y₃	y₄
2007	69.5	9103	54,731	36,564	27,674	111,691	15,348	115,788
2008	73.6	7937	64,125	34,036	32,464	131,724	18,808	136,828
2009	75.3	7230	74,721	31,373	33,584	138,093	22,682	154,765
2010	74.0	6643	85,900	29,434	38,431	165,123	27,259	182,062
2011	73.8	6883	98,625	28,510	44,782	195,139	32,927	216,124
2012	70.7	6876	111,216	27,815	49,085	208,901	36,896	244,856
2013	63.4	6925	122,911	26,699	53,028	222,333	40,897	277,984
2014	56.1	6024	128,609	24,943	55,626	233,197	45,402	310,654
2015	45.8	4243	127,140	23,100	57,775	234,969	47,761	349,745
2016	36.2	2794	132,193	20,662	60,139	245,406	51,499	390,828
2017	31.5	2657	141,749	19,376	62,100	275,119	57,906	438,356
2018	26.7	2408	156,610	19,209	64,745	301,089	65,493	489,701
2019	21.7	2155	160,135	19,103	70,467	317,109	70,904	534,233