Eighteen months and $150,000 later, a rigorous voter fraud investigation commissioned by Iowa Secretary of State Matt Schultz (R) has failed to produce any statistically significant evidence of voter fraud in Iowa, according to The Des Moines Register.

Since taking office in 2011, Schultz has made safeguarding the ballot box from fraud a top state priority, striking a two-year deal with the Iowa Division of Criminal Investigation in 2012 that directed $280,000 of federal funds toward voter fraud inquiries. Additionally, a full-time agent was hired and assigned to pursue voter fraud cases.

Although Schultz had expected to unveil “a lot” of voter fraud cases, the investigation so far has yielded just five guilty pleas and five dismissals, The Des Moines Register reported late Sunday.

Of the five guilty pleas, three of them involved felons who had completed their prison terms but whose voting rights had not yet been restored when they went to vote.

More: Iowa Republican Spent $150,000 to Expose Voter Fraud, Instead Found Nothing Significant