$25 I Bond with 3.30% Fixed Rate Purchased March 1999

 Jan
1
Feb
1
Mar
1
Infla
tion
Rate
Com
posite
Rate
Apr
1
May
1
Jun
1
Jul
1
Aug
1
Sep
1
Infla
tion
Rate
Com
posite
Rate
Oct
1
Nov
1
Dec
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1999 25.000.86%5.05%25.1025.2125.3125.4225.5225.630.86%5.05%25.7425.8425.951999
200026.0626.1726.281.76%6.88%26.4326.5826.7326.8827.0327.181.91%7.18%27.3427.5027.662000
200127.8327.9928.161.52%6.39%28.3128.4628.6128.7628.9129.061.44%6.23%29.2129.3629.512001
200229.6629.8129.971.19%5.72%30.1130.2530.4030.5430.6830.830.28%3.87%30.9331.0331.132002
200331.2331.3331.431.23%5.80%31.5831.7331.8832.0332.1932.341.77%6.90%32.5232.7132.892003
200433.0833.2733.460.54%4.40%33.5833.7033.8333.9534.0734.201.19%5.72%34.3634.5234.692004
200534.8535.0135.181.33%6.00%35.3535.5335.7035.8836.0636.241.79%6.94%36.4536.6536.862005
200637.0737.2837.502.85%9.09%37.7838.0638.3438.6338.9239.200.50%4.32%39.3439.4839.622006
200739.7639.9040.051.55%6.45%40.2640.4840.6940.9141.1241.341.21%5.76%41.5441.7341.932007
200842.1342.3342.531.53%6.41%42.7542.9843.2143.4343.6643.892.42%8.22%44.1944.4844.782008
200945.0845.3945.692.46%8.30%46.0046.3146.6346.9547.2647.59-2.78%0.00%47.5947.5947.592009
201047.5947.5947.591.53%6.41%47.8448.0948.3548.6048.8649.120.77%4.87%49.3249.5249.712010
201149.9150.1150.320.37%4.05%50.4950.6650.8351.0051.1751.342.30%7.98%51.6852.0152.352011
201252.7053.0453.391.53%6.41%53.6753.9554.2454.5254.8155.101.10%5.54%55.3555.6055.862012
201356.1156.3756.630.88%5.09%56.8757.1157.3557.5957.8358.070.59%4.50%58.2958.5058.722013
201458.9459.1659.380.59%4.50%59.6059.8260.0460.2760.4960.720.92%5.17%60.9861.2461.502014
201561.7662.0362.290.74%4.80%62.5462.7863.0363.2863.5363.78-0.80%1.67%63.8763.9664.052015
201664.1364.2264.310.77%4.87%64.5764.8365.0965.3565.6165.880.08%3.46%66.0766.2666.452016
201766.6466.8367.021.38%6.11%67.3667.7068.0468.3868.7269.070.98%5.29%69.3769.6769.982017
201870.2870.5970.901.24%5.82%71.2471.5871.9272.2772.6272.96

From $25.00 to $72.96 over 19.5 years = 5.57% average annual increase compounded semi-annually.

Generated  11/17/17  15:20