Uses the same notes as the chords do.  
I couldn't find a single bass tab on the net.
Not perfect because sounded by ear, enjoy

EADG- standard

Wait until the guitar intro leads to the rest of the band to play

INTRO
Slide from 3 to 12 back to 3 in one strum
G|-------------------------------------------------------|
D|-------------------------------------------------------|
A|-3/12/3----333-----------------------------------------|
E|---------------1-1-11-5-5-55-3-3-33-3-11111111-333-3333|

VERSE pt.1 
Life was simple...
G|---------------|    G|---------------------------------|
D|---------------|    D|---------------------------------|
A|333/1----------| X4 A|---------------------------------|
E|------11-555-33|    E|15-15-15-------------------------|

At the end of the line, HIS WIFE WOULD KEEP HIM WARM

VERSE pt.2 UNTIL CHORUS 
G|----------------|
D|----------------|
A|333/12----------|
E|-------11-555-33|

CHORUS first half of VERSE 1

INTRO

VERSE pt.1

VERSE pt.2

CHORUS

BRIDGE
G--------------------------------------------------------|
D--------------------------------------------------------|
A------------------------33332222--------1313131313131313|
E|55555553333333311111111--------55555555----------------|                

G|----------------------|
D|----------------------|
A|----------------------|
E|11111111-3-3-3-3-3-3-3| 

Rest until there's 37 seconds left then

G|55------5/3 BUT DON'T STRUM 3rd-| 
D|------------3-7-5---------------|
A|--------------------------------|
E|--------------------------------|

Chorus
THEN

G|-----------------------------------|
D|-----------------------------------|
A|-----------------------------------|
E|1313131313131313-0-1313131313131313|