北京 count =4528,  mean = 184.922703180212, std = 286.6671386198717
广东 count =866,  mean = 127.51616628175519, std = 191.43518885057858
上海 count =779,  mean = 164.3607188703466, std = 314.48787609916593
浙江 count =556,  mean = 132.3974820143885, std = 192.8108308631879
江苏 count =209,  mean = 88.29665071770334, std = 142.00547808460084
四川 count =186,  mean = 93.21505376344086, std = 125.78049085715703
陕西 count =240,  mean = 80.4375, std = 81.69089260833452
山东 count =130,  mean = 113.16923076923077, std = 186.83056779183434
天津 count =212,  mean = 104.59905660377359, std = 147.48088348788275
湖北 count =83,  mean = 126.3132530120482, std = 199.37976557257932