$10,000 I Bond with 3.30% Fixed Rate Purchased September 1999

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1999 10,0000.86%5.05%10,04010,08410,1241999
200010,16810,20810,2521.76%6.88%10,30810,36810,42810,48410,54410,6041.91%7.18%10,66810,72810,7922000
200110,85610,92010,9841.52%6.39%11,04011,10011,16011,21611,27611,3361.44%6.23%11,39611,45211,5122001
200211,57211,62811,6881.19%5.72%11,74411,80011,85211,90811,96412,0240.28%3.87%12,06412,10012,1402002
200312,18012,21612,2561.23%5.80%12,31612,37212,43212,49212,55212,6121.77%6.90%12,68412,75612,8282003
200412,90012,97213,0480.54%4.40%13,09613,14413,19213,24013,28813,3361.19%5.72%13,40013,46013,5242004
200513,58813,65213,7161.33%6.00%13,78413,85213,92013,98814,06014,1281.79%6.94%14,20814,28814,3722005
200614,45214,53614,6202.85%9.09%14,72814,84014,94815,06015,17215,2840.50%4.32%15,34015,39215,4482006
200715,50415,56015,6161.55%6.45%15,70015,78415,86415,94816,03616,1201.21%5.76%16,19616,27216,3522007
200816,42816,50416,5841.53%6.41%16,67216,76016,84816,93617,02417,1162.42%8.22%17,23217,34817,4642008
200917,58017,70017,8202.46%8.30%17,94018,06418,18818,30818,43618,560-2.78%0.00%18,56018,56018,5602009
201018,56018,56018,5601.53%6.41%18,65618,75618,85618,95619,05619,1560.77%4.87%19,23219,31219,3882010
201119,46419,54419,6240.37%4.05%19,68819,75619,82019,88819,95620,0202.30%7.98%20,15220,28420,4162011
201220,54820,68420,8201.53%6.41%20,92821,04021,15221,26421,37621,4881.10%5.54%21,58821,68421,7842012
201321,88421,98422,0840.88%5.09%22,17622,26822,36422,45622,55222,6480.59%4.50%22,73222,81622,9002013
201422,98823,07223,1560.59%4.50%23,24423,32823,41623,50423,58823,6760.92%5.17%23,77623,88023,9802014
201524,08424,18424,2880.74%4.80%24,38424,48024,57624,67624,77224,872-0.80%1.67%24,90824,94024,9762015
201625,01225,04425,0800.77%4.87%25,18025,28025,38425,48425,58825,6920.08%3.46%25,76425,84025,9122016
201725,98826,06026,1361.38%6.11%26,26826,40026,53226,66426,80026,9360.98%5.29%27,05227,17227,2882017
201827,40827,52827,6481.24%5.82%27,78027,91228,04828,18028,31628,4521.11%5.56%28,58428,71228,8442018
201928,97629,10829,244

From $10,000 to $29,244 over 19.5 years = 5.58% average annual increase compounded semi-annually.

Generated  05/01/18  10:10