Level	XP needed	Estimated wealth
2	1000	900 gp
3	3000	2700 gp
4	6000	5400 gp
5	10000	9000 gp
6	15000	13500 gp
7	21000	18900 gp
8	28000	25200 gp
9	36000	32400 gp
10	45000	40500 gp
11	55000	49500 gp
12	66000	59400 gp
13	78000	70200 gp
14	91000	81900 gp
15	105000	94500 gp
16	120000	108000 gp
17	136000	122400 gp
18	153000	137700 gp
19	171000	153900 gp
20	190000	171000 gp

Generator by Rodrigo Flores: http://rpg20.com/