stata中二分类变量怎么填补缺失值

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有一个二分类变量，取值分别为0和1，想知道用什么方法填补缺失值比较好，命令是什么，请各路大神指教！

input str12 ID float lc
"010104109001" .
"010104120001" 0
"010104230001" 0
"010104306002" 0
"010104331001" 0
"010206215002" .
"010206231001" 0
"010206306001" 0
"010206306002" 0
"010206311001" .
"010233106001" .
"010233112002" 0
"010233117002" 0
"010233119001" 0
"010233126002" .
"010233129001" 0
"010233132002" 0
"010233135002" 0
"010233136002" .
"010233228001" 0
"010233317002" 0
"010233333001" 0
"010233336002" 1
"010446111001" 0
"010446123001" 0
"010446123002" 0
"010446131002" 0
"010446213002" 0
"010446216002" 0
"010446218002" .
"010446220001" .
"010446222001" 0
"010446224002" 1
"010446236001" 0
"010446236002" 0
"010451105001" .
"010451105002" .
"010451114002" .
"010451122001" .
"010451124001" .
"010451126002" .
"010451302001" .
"010451310002" .
"010451321001" .
"010451321002" .
"014031203002" 0
"014031206002" .
"014031209003" 0
"014031218002" .
"014031229001" 0
"014031303001" 0
"014031304001" .
"014031307001" .
"014031316001" .
"014031327001" .
"014031327002" .
"014031330001" .
"014051104002" 0
"014051110002" .
"014051112001" .
"014051112002" .
"014051115002" .
"014051115003" .
"014051119001" .
"014051119002" .
"014051125001" 1
"014051125002" 0
"014051126001" .
"014051126002" .
"014051127001" .
"014051127002" .
"014051128001" .
"014051128002" .
"014051207002" 0
"014051210001" 0
"014051214002" .
"014051218002" 0
"014051227002" .
"014051232002" 0
"014051234001" 0
"014051235001" 0
"014051301001" 0
"014051301002" 0
"014051303001" .
"014051303002" .
"014051307001" .
"014051307002" 0
"014051328002" .
"014051330002" .
"014643110002" 0
"014643128002" .
"014643129002" .
"014643132001" 0
"014643133001" .
"014643201001" .
"014643209001" .
"014643210002" 0
"014643217001" .
"014643224001" 0
"014643227001" 0
end
[/CODE]

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