data gamdist;
input cust_xref_id 1-6	Fico 9-12	rsn_cd1 13-15	rsn_cd2	17-19 Yr_Month $21-28;
cards;
15013	668	39	18	2014-01
15013	668	39	18	2014-02
15013	668	39	18	2014-03
15013	670	39	18	2014-04
15013	678	39	18	2014-05
15013	638	38	20	2014-07
15013	635	38	20	2014-08
15013	635	38	20	2014-09
15013	643	38	20	2014-10
15013	643	38	20	2014-11
15013	648	38	24	2014-12
15013	648	38	24	2015-01
15013	648	38	24	2015-02
15013	651	38	24	2015-04
15013	653	38	24	2015-05
15013	653	38	24	2015-07
15013	654	38	24	2015-08
15013	661	38	24	2015-09
15013	662	38	24	2015-10
15013	662	38	24	2015-11
;
run;


how to convert the above data to single record from minimum yr_month to maximum as below 

cust_xref_id fico_2014_01 rsn_cd1_2014_01 rsn_cd2_2014_01 fico_2014_02 rsn_cd1_2014_02 rsn_cd2_2014_02 ..........so on .....