如题，Consolidationcode表示财务指标的来源，对于OperatingrevenuethLCU这一指标，我想生成一个Operatingrevenue这一变量，如果C1这一来源不是空值，新变量就取来源为C1时OperatingrevenuethLCU的值，如果为空，则依次看C2\C\U......等来源。初次提问，请大佬多多指教！

数据奉上

input str93 CompanynameLatinalphabet str2 Consolidationcode int year str17 OperatingrevenuethLCU str18 P_LbeforetaxthLCU
"AGRICULTURAL BANK OF CHINA LIMITED" "C"  2007 "179237000" "78257000"
"AGRICULTURAL BANK OF CHINA LIMITED" "C1" 2007 "n.a."      "n.a."     
"AGRICULTURAL BANK OF CHINA LIMITED" "C"  2008 "211189000" "52349000"
"AGRICULTURAL BANK OF CHINA LIMITED" "C1" 2008 "n.a."      "n.a."     
"AGRICULTURAL BANK OF CHINA LIMITED" "C"  2009 "222274000" "73928000"
"AGRICULTURAL BANK OF CHINA LIMITED" "C1" 2009 "n.a."      "n.a."     
"AGRICULTURAL BANK OF CHINA LIMITED" "C"  2010 "292253000" "120734000"
"AGRICULTURAL BANK OF CHINA LIMITED" "C1" 2010 "291771000" "120734000"
"AGRICULTURAL BANK OF CHINA LIMITED" "C"  2011 "377731000" "158201000"
"AGRICULTURAL BANK OF CHINA LIMITED" "C1" 2011 "379756000" "158201000"
"AGRICULTURAL BANK OF CHINA LIMITED" "C"  2012 "421964000" "187927000"
"AGRICULTURAL BANK OF CHINA LIMITED" "C1" 2012 "424964000" "187927000"
"AGRICULTURAL BANK OF CHINA LIMITED" "C"  2013 "462625000" "214174000"
"AGRICULTURAL BANK OF CHINA LIMITED" "C1" 2013 "465102000" "214174000"
"AGRICULTURAL BANK OF CHINA LIMITED" "C"  2014 "516954000" "232257000"
"AGRICULTURAL BANK OF CHINA LIMITED" "C1" 2014 "520222000" "232257000"
"AGRICULTURAL BANK OF CHINA LIMITED" "C"  2015 "528184000" "230857000"
"AGRICULTURAL BANK OF CHINA LIMITED" "C1" 2015 "532863000" "230857000"
"AGRICULTURAL BANK OF CHINA LIMITED" "C"  2016 "494805000" "226624000"
"AGRICULTURAL BANK OF CHINA LIMITED" "C1" 2016 "498908000" "226624000"
"AGRICULTURAL BANK OF CHINA LIMITED" "C"  2017 "514489000" "239478000"
"AGRICULTURAL BANK OF CHINA LIMITED" "C1" 2017 "520360000" "239478000"
"AGRICULTURAL BANK OF CHINA LIMITED" "C"  2018 "580936000" "251674000"
"AGRICULTURAL BANK OF CHINA LIMITED" "C1" 2018 "583779000" "251674000"
"AGRICULTURAL BANK OF CHINA LIMITED" "C"  2019 "603919000" "266576000"
"AGRICULTURAL BANK OF CHINA LIMITED" "C1" 2019 "606046000" "266576000"
"AGRICULTURAL BANK OF CHINA LIMITED" "C"  2020 "630088000" "265050000"
"AGRICULTURAL BANK OF CHINA LIMITED" "C1" 2020 "631977000" "265050000"
"AGRICULTURAL BANK OF CHINA LIMITED" "C"  2021 "688927000" "295880000"
"AGRICULTURAL BANK OF CHINA LIMITED" "C1" 2021 "691167000" "295880000"
"ALLIED COMMERCIAL BANK"             "U1" 2007 "n.a."      "n.a."     
"ALLIED COMMERCIAL BANK"             "U1" 2008 "n.a."      "n.a."     
"ALLIED COMMERCIAL BANK"             "U1" 2009 "n.a."      "n.a."     
"ALLIED COMMERCIAL BANK"             "U1" 2010 "n.a."      "n.a."     
"ALLIED COMMERCIAL BANK"             "U1" 2011 "n.a."      "n.a."     
"ALLIED COMMERCIAL BANK"             "U1" 2012 "n.a."      "n.a."     
"ALLIED COMMERCIAL BANK"             "U1" 2013 "n.a."      "n.a."     
"ALLIED COMMERCIAL BANK"             "U1" 2014 "n.a."      "n.a."     
"ALLIED COMMERCIAL BANK"             "U1" 2015 "n.a."      "n.a."     
"ALLIED COMMERCIAL BANK"             "U1" 2016 "n.a."      "n.a."     
"ALLIED COMMERCIAL BANK"             "U1" 2017 "n.a."      "n.a."     
"ALLIED COMMERCIAL BANK"             "U1" 2018 "n.a."      "n.a."     
"ALLIED COMMERCIAL BANK"             "U1" 2019 "49368"     "16268"   
"ALLIED COMMERCIAL BANK"             "U1" 2020 "8303"      "3251"     
"ALLIED COMMERCIAL BANK"             "U1" 2021 "23296"     "-6741"   
"ANHUI XIN AN BANK CO., LTD."        "U1" 2007 "n.a."      "n.a."     
"ANHUI XIN AN BANK CO., LTD."        "U1" 2008 "n.a."      "n.a."     
"ANHUI XIN AN BANK CO., LTD."        "U1" 2009 "n.a."      "n.a."     
"ANHUI XIN AN BANK CO., LTD."        "U1" 2010 "n.a."      "n.a."     
"ANHUI XIN AN BANK CO., LTD."        "U1" 2011 "n.a."      "n.a."