How Chris Evans voted compared to someone who believes that the federal government should increase restrictions on the gambling industry in order to address the issue of problem gambling

Division Chris Evans Supporters vote

9th Feb 2012, 12:55 PM – Senate Documents — Gambling; Order for the Production of Documents

absent Yes

How "never voted on" is worked out

Normally a person's votes count towards a score which is used to work out a simple phrase to summarise their position on a policy. However in this case Chris Evans was absent during all divisions for this policy. So, it's impossible to say anything concrete other than that they have "never voted" on this policy.