Table:
PB1	PB2	PB3	PB4	PB5	PB6	PB7	PB8
PB1	1
PB2	0.49	1
PB3	−0.03	−0.01	1
PB4	0.21	0.22	0.14	1
PB5	0.52	0.38	−0.03	0.26	1
PB6	0.05	0.03	0.05	0.01	0.12	1
PB7	0.34	0.22	−0.02	0.37	0.45	0.05	1
PB8	0.35	0.31	0.20	0.08	0.8	0.08	0.13	1

Transcribe the table into Markdown format.

|  | PB1 | PB2 | PB3 | PB4 | PB5 | PB6 | PB7 | PB8 | 
 | --- | --- | --- | --- | --- | --- | --- | --- | --- | 
 | PB1 | 1 |  |  |  |  |  |  |  | 
 | PB2 | 0.49 | 1 |  |  |  |  |  |  | 
 | PB3 | −0.03 | −0.01 | 1 |  |  |  |  |  | 
 | PB4 | 0.21 | 0.22 | 0.14 | 1 |  |  |  |  | 
 | PB5 | 0.52 | 0.38 | −0.03 | 0.26 | 1 |  |  |  | 
 | PB6 | 0.05 | 0.03 | 0.05 | 0.01 | 0.12 | 1 |  |  | 
 | PB7 | 0.34 | 0.22 | −0.02 | 0.37 | 0.45 | 0.05 | 1 |  | 
 | PB8 | 0.35 | 0.31 | 0.20 | 0.08 | 0.8 | 0.08 | 0.13 | 1 |