What is the distribution of evidence types used to support or refute drug interaction related assertions in the DIKB?

Statement: 

What is the distribution of evidence types used to support or refute drug interaction related assertions in the DIKB ? A limit of results per page $number$ (e.g. 10)

Query: 
PREFIX swanco: <http://purl.org/swan/1.2/swan-commons#> PREFIX dikbEvidence: <http://dbmi-icode-01.dbmi.pitt.edu/dikb-evidence/DIKB_evidence_ontology_v1.3.owl#> SELECT ?evidenceType (COUNT(?a) AS ?count) WHERE { ?a swanco:citesAsSupportingEvidence ?evidenceItem. ?evidenceItem dikbEvidence:Evidence_type ?evidenceType. } GROUP BY ?evidenceType ORDER BY ?evidenceType limit ??number