df

df_melt = df.melt(id_vars="religion", var_name='income', value_name='freq')
df_melt.sort_values(by=["religion"], inplace=True)
df_melt

	religion	<$10k	$10-20k	$20-30k	$30-40k	$40-50k	$50-75k
0	Agnostic	27	34	60	81	76	137
1	Atheist	12	27	37	52	35	70
2	Buddhist	27	21	30	34	33	58
3	Catholic	418	617	732	670	638	1116
4	Dont know/refused	15	14	15	11	10	35
5	Evangelical Prot	575	869	1064	982	881	1486
6	Hindu	1	9	7	9	11	34
7	Historically Black Prot	228	244	236	238	197	223
8	Jehovahs Witness	20	27	24	24	21	30
9	Jewish	19	19	25	25	30	95

	religion	income	freq
0	Agnostic	<$10k	27
30	Agnostic	$30-40k	81
40	Agnostic	$40-50k	76
50	Agnostic	$50-75k	137
10	Agnostic	$10-20k	34
...	...	...	...
39	Jewish	$30-40k	25
19	Jewish	$10-20k	19
9	Jewish	<$10k	19
49	Jewish	$40-50k	30
59	Jewish	$50-75k	95