DECLARE @number_of_years AS NVARCHAR(2)

if @Method LIKE 'RSD_____%' or @Method LIKE 'RMS_______%' begin
	SET @number_of_years = (@yearto-@yearfrom)+1 
end


if @Method LIKE 'RSD_t%' begin

	if (SELECT SUBSTRING(@Method, 21, 1)) = '0' begin
		SET @number_of_years = (SELECT SUBSTRING(@Method, 22, 1))  
	
	end
	else begin
		SET @number_of_years = (SELECT SUBSTRING(@Method, 21, 2))
	end

end 


CAST (@number_of_years AS INT)