Target Audience: Who is it?

Who would own/read/enjoy a piece of information graphics that communicates: the average human breathes 370,00 cubic metres of air in their lifetime?

Sex: Male and female, both genders would read this.
Age: The brief says to design this for 18 - 25 year olds. However personally i think over 25's and maybe 16 - 18 year olds would read this, you will understand why later in this post.

Relationship Status: N/A All types of people, gay, straight, married, married with children... you cant pin point this, where as you could for a gay bar poster (obviously it would be targeted at gays)

Personally i think Doctors, Nurses, Teachers and students would be interested in/ or read/own this piece of information graphics because:
Doctors: The statistic is based upon health. I could see this piece of info graphics displayed in a hospital or health practice.
Nurses: For the same reason as above.
Teachers: This kind of statistic could be taught in science lessons, therefore would be useful to teach children, kids prefer learning from pictures.
Students: This comes from the teachers, if the teachers own this, they will be teaching it to their student.