Table:
text: List of Oregon ballot measures
1960s
1960 General Election
meas_num_ passed YES_votes NO_votes _YES Const_Amd_ type_ description
11 YES 399210 222736 64.19% Yes LEG Financing Improvements in Home Rule Counties
12 YES 578266 88995 86.66% Yes LEG Continuity of Government in Enemy Attack
13 YES 415931 266630 60.94% Yes LEG War Veterans` Bonding and Loan Amendment
14 No 115610 570025 16.86% No Ref Personal Income Tax Bill

Question: Under Oregon election measures, what is each % yes if the type is ref in the 1960 general election in the 1960s?