Facing problem with XML type column

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C#

SQL-Server

I have a table with a column of XML type. This table contains more than thousand rows in it.
When I am trying to select top 200 rows , it is taking more than 2 seconds.

check the sample code below

<code>
create table tblEmp
(
	empid int identity(1,1),
	empDesc xml
)
GO
declare @i int
set @i=1
while @i < 200
begin
insert into tblEmp values(
'<employees>
	<employee dept="ITS">
		<id>'+convert(varchar, @i)+'</id>
		<name>NAME'+convert(varchar, @i)+'</name>	
		<address>ADDRESS'+convert(varchar, @i)+'</address>
		<phone>	
			<homeph valid="true">HOMEPHONE'+convert(varchar, @i)+'</homeph>
			<workph>WORKPH'+convert(varchar, @i)+'</workph>
		</phone>
	</employee>
</employees>')
set @i = @i +1
end
Go</code>

select empDesc from tblEmp -- Taking more than 3 seconds
select empid from tblEmp -- not taking even a second



Can anyone tell me why it is taking too much time only to return 200 rows.
Thanks in advance.