Note: Sample taken on 03/01/2018, not an average over the life of the API

Endpoint (api.census.gov/data<path>) Estimated Traffic (percentage of traffic)
/2016/acs/acs5 13.45887
/2013/acs5 9.80887
/2016/acs/acs5/profile 6.00928
/2015/acs5 3.64111
/2011/acs5 2.66503
/2014/acs5/profile 2.37300
/2010/sf1 2.02314
/2014/acs5 1.90011
/2012/sbo 1.78908
/2017/pep/population 1.45878
/2016/acs/acs1/profile 1.35118
/2016/pep/population 1.20383
/timeseries/idb/5year 0.53125
/timeseries/poverty/saipe 0.46852
/timeseries/poverty/histpov2 0.46844
/2015/acs/acs1/subject 0.39208
/timeseries/healthins/sahie 0.37237
/2010/acs5 0.35507
/2015/acs1/subject 0.35258
/2016/intltrade/imp_exp 0.27840
/2012/ewks 0.26570
/2009/acs5 0.25962
/2012/acs5 0.25822
/2015/cbp 0.25401
/2016/pep/charage 0.22472
/2000/sf1 0.20859
/2000/sf3 0.19963
/timeseries/eits/resconst 0.19877
/2011/acs/acs5 0.17547
/2015/zbp 0.16721
/timeseries/intltrade/imports/hs 0.16332
/2015/acs1/profile 0.15895
/2015/acs/acs5 0.15638
/timeseries/intltrade/exports/hs 0.15475
/2016/pep/charagegroups 0.15467
/2016/acs/acs5/subject 0.13971
/timeseries/intltrade/exports/statenaics 0.13932
/2015/acs/flows 0.13293
/2013/acs5/profile 0.12311
/2016/acs/acs1/subject 0.12303
/2007/ewks 0.11431
/2016/acs/acsse 0.10667
/data.json 0.10386
/2014/pep/cty 0.09763
/timeseries/eits/vip 0.09732
/2016/acs/acs1 0.09514
/2015/acs5/profile 0.09163
/2015/nonemp 0.09015
/2014/acs1 0.08727
/timeseries/eits/marts 0.08470
/2013/pep/subcty 0.07932
/timeseries/qwi/sa 0.07901
/2002/ewks 0.07870
/1997/ewks 0.07846
/2015/acs/acs5/subject 0.07628
/2013/nonemp 0.07581
/timeseries/qwi/rh 0.07558
/2014/zbp 0.07535
/2012/zbp 0.07496
/2013/zbp 0.07496
/2014/cbp 0.07496
/2012/cbp 0.07480
/2013/cbp 0.07480
/2011/cbp 0.07472
/2012/nonemp 0.07410
/timeseries/eits/qtax 0.07387
/2015/acs1 0.07355
/2016/pdb/blockgroup 0.07340
/timeseries/asm/industry 0.07293
/2011/nonemp 0.07207
/2014/nonemp 0.07207
/1990/sf3 0.07153
/timeseries/eits/m3 0.07137
/timeseries/eits/mtis 0.07137
/1990/pep/int_charagegroups 0.07130
/1999/zbp 0.07130
/timeseries/eits/hv 0.07130
/2013/pep/cty 0.07114
/timeseries/eits/ressales 0.07114
/timeseries/intltrade/imports/enduse 0.07114
/2012/acs5/profile 0.07106
/2016/intltrade/stnaics 0.07106
/timeseries/eits/ftd 0.07106
/timeseries/eits/mhs 0.07106
/timeseries/eits/mrts 0.07106
/timeseries/eits/mwts 0.07106
/timeseries/eits/qfr 0.07106
/timeseries/eits/qpr 0.07106
/timeseries/eits/qss 0.07106
/2015/acs/acsse 0.07091
/2013/acs1/profile 0.07083
/2010/acs/flows 0.07075
/2015/acs/acs5/profile 0.07044
/2015/acs1/cprofile 0.07036
/2012/acs1/profile 0.07020
/2015/acs/acs1/profile 0.07005