About: http://webisa.webdatacommons.org/49199192

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	so most likely all of your variables are being treated as strings and Highcharts is expecting numbers in the data - you can convert to a int or float by multiplying by 1 or using parseFloat() or parseInt()
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com