Let's look at the behaviour of the taxpayers most directly affected. Form T1135 is for the disclosure of offshore assets. Individuals and corporations have to report them. Since 2013, the number of those reported each year has more than doubled.
Taxpayers, as a general rule of thumb, are twice as likely to disclose their offshore assets as they were in the past. With regard to voluntary disclosures, if you look at the three previous years versus the three years prior to that, in a six-year period, the offshore voluntary disclosure has doubled. Taxpayers who have assets offshore were twice as likely to come in through the voluntary disclosure program to disclose those assets.
In the November 2017 Fiscal Monitor, the Department of Finance noted that corporate tax revenue had increased 7.5%. GDP growth was 2% or 3%, but there is an extra $10 billion on an annual basis in corporate tax revenue coming in voluntarily. I can talk a bit about the agency's actual results, but if you look at the behaviour of multinationals, non-residents' tax is up roughly 23%. Non-residents are paying more tax voluntarily.
In terms of the ultimate outcome of people complying voluntarily, the results are there. I mentioned the direct revenue generation target from the budget funding, which was $380 million. We had $500 million, but we are also building the automated tools that convince the insiders, the aggressive tax planners, that we have the technology.
We talk a lot about electronic funds transfers over $10,000 and using that as a line of sight to aggressive tax planning. The budget money gave us the funds to automate that process. We are on track to automating that system, which will allow us to peer into 1.5 million international fund flows per year, and to have the data analytics to reach in and find the ones that are problematic.
Five or six years ago we had a few offshore audits. We perhaps had one criminal investigation in that space, and today we can report that we have more than 40 criminal investigations, like the Panama Papers search that was reported widely recently, and more than 1,000 audits in this space.
I would say it remains a $1-billion issue. It remains a priority for the agency, but there are promising early signs.