added average time between surveys
added average time between surveys

GeoODK/onadata,eHealthAfrica/onadata,mainakibui/kobocat,SEL-Columbia/formhub,sounay/flaminggo-test,spatialdev/onadata,wesley1001/formhub,wesley1001/formhub,GeoODK/formhub,ultimateprogramer/formhub,smn/onadata,makinacorpus/formhub,ehealthafrica-ci/formhub,mainakibui/kobocat,jomolinare/kobocat,awemulya/fieldsight-kobocat,ehealthafrica-ci/formhub,spatialdev/onadata,hnjamba/onaclone,sounay/flaminggo-test,smn/onadata,SEL-Columbia/nmis,mainakibui/kobocat,kobotoolbox/kobocat,smn/onadata,ehealthafrica-ci/onadata,GeoODK/onadata,ehealthafrica-ci/formhub,jomolinare/kobocat,kobotoolbox/kobocat,hnjamba/onaclone,kobotoolbox/kobocat,piqoni/onadata,ultimateprogramer/formhub,makinacorpus/formhub,hnjamba/onaclone,ehealthafrica-ci/onadata,piqoni/onadata,qlands/onadata,spatialdev/onadata,kobotoolbox/kobocat,piqoni/onadata,qlands/onadata,qlands/onadata,GeoODK/formhub,SEL-Columbia/formhub,GeoODK/formhub,SEL-Columbia/nmis,ehealthafrica-ci/onadata,awemulya/fieldsight-kobocat,SEL-Columbia/formhub,eHealthAfrica/onadata,SEL-Columbia/formhub,GeoODK/onadata,spatialdev/onadata,makinacorpus/formhub,awemulya/fieldsight-kobocat,jomolinare/kobocat,ultimateprogramer/formhub,ehealthafrica-ci/formhub,ehealthafrica-ci/onadata,mainakibui/kobocat,eHealthAfrica/formhub,hnjamba/onaclone,awemulya/fieldsight-kobocat,SEL-Columbia/nmis,smn/onadata,GeoODK/onadata,sounay/flaminggo-test,SEL-Columbia/nmis,jomolinare/kobocat,wesley1001/formhub,ultimateprogramer/formhub,SEL-Columbia/nmis,piqoni/onadata,eHealthAfrica/formhub,eHealthAfrica/onadata,wesley1001/formhub,eHealthAfrica/formhub,qlands/onadata,makinacorpus/formhub,eHealthAfrica/formhub,SEL-Columbia/nmis,sounay/flaminggo-test