这个数字比较靠谱， 25英里／加仑不叫省油的车。2.5刀/加仑也不是常年都有的

数据来源：http://data.bls.gov/cgi-bin/surveymost

Consumer Price Index - Average Price Data
Original Data Value
Series Id:	APU000074714
Area:	U.S. city average
Item:	Gasoline, unleaded regular, per gallon/3.785 liters
Years:	2005 to 2015
Year	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
2005	1.823	1.918	2.065	2.283	2.216	2.176	2.316	2.506	2.927	2.785	2.343	2.186
2006	2.315	2.310	2.401	2.757	2.947	2.917	2.999	2.985	2.589	2.272	2.241	2.334
2007	2.274	2.285	2.592	2.860	3.130	3.052	2.961	2.782	2.789	2.793	3.069	3.020
2008	3.047	3.033	3.258	3.441	3.764	4.065	4.090	3.786	3.698	3.173	2.151	1.689
2009	1.787	1.928	1.949	2.056	2.265	2.631	2.543	2.627	2.574	2.561	2.660	2.621
2010	2.731	2.659	2.780	2.858	2.869	2.736	2.736	2.745	2.704	2.795	2.852	2.985
2011	3.091	3.167	3.546	3.816	3.933	3.702	3.654	3.630	3.612	3.468	3.423	3.278
2012	3.399	3.572	3.868	3.927	3.792	3.552	3.451	3.707	3.856	3.786	3.488	3.331
2013	3.351	3.693	3.735	3.590	3.623	3.633	3.628	3.600	3.556	3.375	3.251	3.277
2014	3.320	3.364	3.532	3.659	3.691	3.695	3.633	3.481	3.403	3.182	2.887	2.560
2015	2.110	2.249	2.483	2.485	2.775	2.832	2.832	2.679

以上简单计算 sum/116（116个月）= 3.2955

 

所有跟帖： 

• 还是你厉害，有数据做后盾：－） -色大胆小- ♂ (0 bytes) () 10/06/2015 postreply 07:49:36

• 你也很厉害，拍拍脑袋就能说出这么准确数字！牛人呀！ -W050404- ♂ (0 bytes) () 10/06/2015 postreply 08:42:53