Richest Cities in the World

Here are the cities where the most billionaires live.  Some of this is based on other lists, some of it is a wild guess.

1	New York	84
2	Moscow	77
3	Hong Kong	65
4	Beijing	57
5	London	49
6	Mumbai	33
7	Istanbul	28
8	Taipei	28
9	Paris	27
10	Seoul	27
11	Shenzhen	27
12	Tokyo	27
13	Singapore	27
14	Sao Paolo	26
15	Riyadh	25
16	San Francisco/San Jose	24
17	Shanghai	24
18	Dubai	24
19	Los Angeles	20
20	Jakarta	19
21	Hangzhou	19
22	Bangkok	17
23	Dallas	17
24	Kuwait City	17
25	Chicago	16
26	Houston	15
27	Guangzhou	15
28	Abu Dhabi	13
29	Washington DC	13
30	Qatar	12
31	Delhi	12
32	Jeddah	10
33	Miami	10
34	Munich	9
35	Sydney	9
36	Amsterdam	8
37	Boston	8
38	Frankfurt	7
39	Rome	6
40	Mexico City	6
41	Toronto	6
42	Stockholm	6
43	Zurich	5
44	Berlin	5
45	Montreal	5
46	Osaka	4
47	Geneva	3

I think this is a complete list of cities with more than 2 billionaires who live there. I could have very easily made a mistake as it is very hard to get this information, and half of these are guesses.

Update:  It seems like Hamburg should be on the list.