Historic and Current Corporate Bond Yields

Can anyone help me find historic Canadian corporate bond yields for free? I don’t have access to a bloomberg terminal and haven’t been able to find a reliable online source yet. I’m looking for the average daily yields for the past three years or so. Any help would be greatly appreciated, thanks.

FOR historical: Bank of Canada http://www.bankofcanada.ca/en/rates/sel_hist.html public, go to some public websites like bloomberg or something.

Like the DEX All Corp Index?

I’m looking for an index of investment grade corporate bond yields. Can’t seem to find this information. Maybe I’m missing it somewhere.

The DEX All Corp Index is what I’m looking for, thanks Turkish. Now I just need to find the historical data for free somewhere.