How to loop my same statement

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SQL-Server-2014

How to shorten the my statement for 100 records different of Nation_code and Description.

Example:-
INSERT INTO @SHY_DT
SELECT Description,
ISNULL(COUNT(Quantity),0),
ISNULL(SUM(Quantity),0)
FROM M_Master
WHERE
scode = @BMSCode
AND
Nation_Code = Ncode

My Table
Ncode Description
MYS Malaysia
SGP Singapore
CHN China
......

What I have tried:

Currently, My statement as below

INSERT INTO @SHY_DT
SELECT  Description,
ISNULL(COUNT(Quantity),0),
ISNULL(SUM(Quantity),0)
FROM M_Master
WHERE 
scode = @BMSCode
AND 
Nation_Code = 'MYS'
;

INSERT INTO @SHY_DT
SELECT  'MALAYSIA',
ISNULL(COUNT(Quantity),0),
ISNULL(SUM(Quantity),0)
FROM M_Master
WHERE 
scode = @BMSCode
AND 
Nation_Code = 'MYS'
;

INSERT INTO @SHY_DT
SELECT 'SINGAPORE', 
ISNULL(COUNT(Quantity),0),
ISNULL(SUM(Quantity),0)
FROM M_Master
WHERE 
s_code = @BMSCode
AND 
Nation_Code = 'SGP'
;

INSERT INTO @SHY_DT
SELECT.....