00	General	18,803
01	History and biography	11,429
03	Mathematical logic and foundations	6,379
05	Combinatorics	8,454
06	Orders, lattices, ordered algebraic structures	2,499
08	General algebraic systems	2,276
11	Number theory	11,182
12	Field theory and polynomials	4,396
13	Commutative rings and algebras	5,068
14	Algebraic geometry	8,530
15	Linear and multilinear algebra; matrix theory	5,617
16	Associative rings and algebras	3,525
17	Nonassociative rings and algebras	2,924
18	Category theory, homological algebra	3,286
19	K-theory	2,259
20	Group theory and generalizations	7,284
22	Topological groups, Lie groups	6,081
26	Real functions	5,300
28	Measure and integration	5,897
30	Functions of a complex variable	5,876
31	Potential theory	1,871
32	Several complex variables and analytic spaces	3,389
33	Special functions	2,539
34	Ordinary differential equations	7,840
35	Partial differential equations	11,017
37	Dynamical systems and ergodic theory	3,882
39	Finite differences and functional equations	2,217
40	Sequences, series, summability	2,283
41	Approximations and expansions	2,830
42	Fourier analysis	4,785
43	Abstract harmonic analysis	2,519
44	Integral transforms, operational calculus	1,768
45	Integral equations	2,154
46	Functional analysis	8,292
47	Operator theory	4,926
49	Calculus of variations and optimal control; optimization	4,891
51	Geometry	5,686
52	Convex and discrete geometry	3,086
53	Differential geometry	8,448
54	General topology	4,749
55	Algebraic topology	5,788
57	Manifolds and cell complexes	5,336
58	Global analysis, analysis on manifolds	6,722
60	Probability theory and stochastic processes	8.315
62	Statistics	4,870
65	Numerical analysis	6,714
68	Computer science	8,546
70	Mechanics of particles and systems	2,675
74	Mechanics of deformable solids	1,217
76	Fluid mechanics	2,964
78	Optics, electromagnetic theory	1,362
80	Classical thermodynamics, heat transfer	952
81	Quantum theory	5,098
82	Statistical physics, structure of matter	2,149
83	Relativity and gravitational theory	2,918
85	Astronomy and astrophysics	1,895
86	Geophysics	882
90	Operations research, mathematical programming	4,968
91	Game theory, economics, social and behavorial sciences	3,820
92	Biology and other natural sciences	4,334
93	Systems theory; control	2,704
94	Information and communications, circuits	2,993
97	Mathematics education	5,637