Table:
Instrument	May	Jun	Jul	Aug
Apathy AES	60	57	52	42
NPI-Q total	18	13	9	6
NPI-Q apathy subscale	9	6	2	2
NPI-Q depression subscale	3	2	2	2
Caregiver burden ZBI	38	36	30	32
Caregiver self-efficacy RSCSE	16	16	18	22

Convert the table into Markdown format.

| Instrument | May | Jun | Jul | Aug | 
 | --- | --- | --- | --- | --- | 
 | Apathy AES | 60 | 57 | 52 | 42 | 
 | NPI-Q total | 18 | 13 | 9 | 6 | 
 | NPI-Q apathy subscale | 9 | 6 | 2 | 2 | 
 | NPI-Q depression subscale | 3 | 2 | 2 | 2 | 
 | Caregiver burden ZBI | 38 | 36 | 30 | 32 | 
 | Caregiver self-efficacy RSCSE | 16 | 16 | 18 | 22 |