handle tuple of arbitrary length, remove first item from time series while percent change and handle nulls
handle tuple of arbitrary length, remove first item from time series while percent change and handle nulls

usc-isi-i2/mydig-webservice,usc-isi-i2/mydig-webservice,usc-isi-i2/mydig-webservice,usc-isi-i2/mydig-webservice