How Do I recreate this Aging Pivot Done In Excel

[#1]

	Period	Period+1	Period+2	Period+3	Period+4	Period+5
Dec12 sales	49%	59%	67%	70%	72%	74%
Jan13 sales	51%	56%	59%	66%	69%
Feb13 sales	47%	52%	56%	63%
Mar13 sales	49%	48%	50%
April13, sales	41%	45%
May13 sales	39%

The above pivot created in excel expresses the aging vintages to which Period refers to the min activity period.