Table Census Data - Summary Column Not Working

I have a table census data containing the number of people having ages ranging from 0 to 120 years. Year 0 is in a column called F_0 and year 120 is in a column called F_120 with everything in between.

For example, when I create a script for the table the column for year 0 appears as: [F_0] [numeric](38, 8) NULL

I've already created 2 summary columns (people 0 to 18 years old and people 19 to 59 years old).

I follow the same methodology to create a summary table for people from 60 to 100 years old, but all the calculated values are NULL.

So the following is successful:
[Under_19] AS (((((((((((((((((([F_0]+[F_1])+[F_2])+[F_3])+[F_4])+[F_5])+[F_6])+[F_7])+[F_8])+[F_9])+[F_10])+[F_11])+[F_12])+[F_13])+[F_14])+[F_15])+[F_16])+[F_17])+[F_18]) PERSISTED,

But this is not:
[Over_60] AS (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((([F_60]+[F_61])+[F_62])+[F_63])+[F_64])+[F_65])+[F_66])+[F_67])+[F_68])+[F_69])+[F_70])+[F_71])+[F_72])+[F_73])+[F_74])+[F_75])+[F_76])+[F_77])+[F_78])+[F_79])+[F_80])+[F_81])+[F_82])+[F_83])+[F_84])+[F_85])+[F_86])+[F_87])+[F_88])+[F_89])+[F_90])+[F_91])+[F_92])+[F_93])+[F_94])+[F_95])+[F_96])+[F_97])+[F_98])+[F_99])+[F_100])+[F_101])+[F_102])+[F_103])+[F_104])+[F_105])+[F_106])+[F_107])+[F_108])+[F_109])+[F_110])+[F_111])+[F_112])+[F_113])+[F_114])+[F_115])+[F_116])+[F_117])+[F_118])+[F_119])+[F_120]) PERSISTED,