This is non-comparable, because we don't invest, and I know that overall,, we would have been better off, if we had trusted the market, rather than looking for security... but in the earlier days, 2000 to 2003, we put our $$$ into IBONDS, and a small fixed annuity. At the time, each person could put $30,000/yr into I bonds, and we took advantage with that.
We had retired early in 1989, at age 53, and had used out IRA's to cover expenses until we began SS in 1999. The balance of our assets went into the IBONDS... At that time, less than the CD rates, but the inflation rate part of the bonds, made sense, looking to the long haul.
While most of you were making good on your investments, we weren't doing as well, but knew what we had.
So... as to the 2018 status? Up just about 5%. more or less the same every year.
The other thing was.. we haven't had to pay income taxes for many years, and don't have to file a tax return (at least for this year).