Y-axis customized representation / Scatter Chart

[#1]

Header 1	Header 2	Header 3	Header 4	Header 5	Header 6
A	we	12	2	21	122
A	e	13	5	12	767
B	dfg	15	6	78	567
B	grf	12	1	56	454
C	e	18	9	45	346

I would like to represent Header 4, Header 5 and Header 6 on Y-axis of a bubble chart. I have defined a mapping as below:

Key	Value
1	Header 4
2	Header 5
3	Header 6

Now i would like to represent these keys as values of Y axis. So values corresponding to each Header will be displayed in a straight horizontal line in front of the key which corresponds to that Header.

Please help me in achieving this.