Go to the Securities Industry and Financial Markets Association website at www.sifma.org and find the most recent data on U.S. corporate underwriting activity using the following steps. Click on “Research.” Click “Statistics and Data.” Click on “US Key Stats.” This will download an Excel file to your computer that contains the relevant data, on the page “Corporate.” How has the distribution of underwriting activity changed since 2012, as reported in Table 4–6 ?