of $3 billion in 1928 (). Other measurements and rankings of net worth Statistics Canada Statistics Canada uses the Survey Financial Security Public Use Microdata File (SFS PUMF) as their principal "family wealth microdata product". Parliamentary Budget Officer In September 2019, the Office of the Parliamentary Budget Officer (PBO)—an independent, non-partisan office that supports the work of parliamentarians by providing authoritative financial and economic analysis of issues related to public monies—published a two-page cost estimate of the "fiscal revenues of an annual tax on the net wealth of high-net-worth families above $20 million". The report was one of 200, requested by the political parties in the months leading up to the 2019 federal election. At that time, the main "family wealth microdata product" used by Statistics Canada—the Survey Financial Security Public Use Microdata File (SFS PUMF)—was found to result in "underreporting" and "missing data." In their 2017 list that ranked Canada's top 100 richest people, Toronto-based Rob McEwen of McEwen Mining, ranked 100th with a net worth of C$875 million, while number 1 on the list—the Toronto-based Thomson family of Thomson Reuters—had a net worth of C$39.13 billion. However, the SFS PUMF only reported on the wealth of families with $27 million or less. In their June 2020 report, the PBO introduced their new "analytic resource" developed to "address the data gap." Their new modelling approach provides a more reliable estimate of family wealth at the top tail of wealth distribution in Canada. Using publicly available data from Canadian Business (CB) magazine and Statistics Canada's micro dataset, the OPBO created a new synthetic micro dataset called the High-net-worth Family Database (HFD) that recalibrates the SFS PUMF by adding a "synthetic dataset of families with wealth over $3 million". Using the more finely grained micro data base, PBO found that the share of the wealth held by top 1% wealthiest Canadian families is 12% higher than the share previously reported using the SFS PUMF. The PBO says that the discrepancy may be due to higher incidences of high net worth families not responding to the SFS. For example, comparing the two surveys based on 2016 data, the SFS PUMF had estimated the wealth held by the top 1% wealthiest Canadians as 13.7%, while the newer calibrated database HFD produced an estimate of 25.6%. Canadian BusinessCanadian Business'', has also published an annual ranking of the wealthiest Canadian individuals and families since 1998.