The following return series comes from Global Financial Data.

Year	Large Stocks	LT Gov Bonds	US T-bills	CPI
			(Rf asset)	(inflation)
2016	11.96%	1.75%	0.20%	2.07%
2017	21.83%	6.24%	0.80%	2.11%
2018	-4.38%	-0.57%	1.81%	1.91%
2019	22.35%	1.35%	2.20%	1.40%
2020	18.16%	10.25%	0.75%	1.88%
2021	28.70%	-1.54%	0.81%	7.00%

Calculate the average real return earned on US T-bills. (Enter percentages as decimals and round to 4 decimals)