Creating get state code function - Inline Table Valued Function, Sql Server

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create function [dbo].[udf_StateCode] (@State nvarchar(64))
returns table with schemabinding as return (
select StateCode = case 
when @State = 'alaska' then 'ak'
when @State = 'alabama' then 'al'
when @State = 'arkansas' then 'ar'
when @State = 'american samoa' then 'as'
when @State = 'arizona' then 'az'
when @State = 'california' then 'ca'
when @State = 'colorado' then 'co'
when @State = 'connecticut' then 'ct'
when @State = 'district of columbia' then 'dc'
when @State = 'delaware'then 'de' 
when @State = 'florida' then 'fl'
when @State = 'federated states of micronesia' then 'fm'
when @State = 'georgia' then 'ga'
when @State = 'guam' then 'gu'
when @State = 'hawaii' then 'hi' 
when @State = 'iowa' then 'ia'
when @State = 'idaho' then 'id'
when @State = 'illinois' then 'il'
when @State = 'indiana' then 'in'
when @State = 'kansas' then 'ks' 
when @State = 'kentucky' then 'ky'
when @State = 'louisiana' then 'la'
when @State = 'massachusetts' then 'ma'
when @State = 'maryland' then 'md' 
when @State = 'maine' then 'me'
when @State = 'marshall islands' then 'mh' 
when @State = 'michigan' then 'mi'
when @State = 'minnesota' then 'mn'
when @State = 'missouri' then 'mo'
when @State = 'northern mariana islands' then 'mp'
when @State = 'mississippi' then 'ms'
when @State = 'montana' then 'mt'
when @State = 'north carolina' then 'nc'
when @State = 'north dakota' then 'nd'
when @State = 'nebraska' then 'ne'
when @State = 'new hampshire' then 'nh' 
when @State = 'new jersey' then 'nj' 
when @State = 'new mexico' then 'nm'
when @State = 'nevada' then 'nv'
when @State = 'new york' then 'ny'
when @State = 'ohio' then 'oh'
when @State = 'oklahoma' then 'ok'
when @State = 'oregon' then 'or'
when @State = 'pennsylvania' then 'pa'
when @State = 'puerto rico'then 'pr' 
when @State = 'rhode island' then 'ri'
when @State = 'south carolina' then 'sc'
when @State = 'south dakota' then 'sd'
when @State = 'tennessee' then 'tn'
when @State = 'texas' then 'tx'
when @State = 'utah' then 'ut'
when @State = 'virginia ' then 'va'
when @State = 'virgin islands' then 'vi' 
when @State = 'vermont' then 'vt'
when @State = 'washington' then 'wa'
when @State = 'wisconsin' then 'wi'
when @State = 'west virginia' then 'wv'
when @State = 'wyoming' then 'wy'
else ''
end 
)
go
select * from dbo.udf_statecode('alaska')

View schema
Execution time: 0 sec, rows selected: 1, rows affected: 0, absolute service time: 0,16 sec