Web based research on market size and cost to society on a variety of areas

Data to include: I have a specific web research task I need performed this weekend

I need relatively quick answers to the majority (75% or more) of the following questions, backed up by web links etc to the research or articles where the data came from.

Any interest in taking this on?

- What is the size of the US and Canadian markets for (Revenue and or # of patients/clients)

(* priority 1, ** priority 2)

Cost to society (US and Canada)
- Substance Abuse
- Drugs *
- Alcohol *
- Smoking
- Obesity *
- Depression**

Size of Market (Revenue and/or # of individuals)
- Gym Memberships *
- Diet Clinics (Jenny Craig etc) *
- Overall Weightloss market **
- Overall Fitness market **
- Sports Medicine market*
- Physical Rehabilitation (exercise oriented)
- Depression Treatment Clinics
- Private and Public sector
- Smoking Treatment Clinics
- Private and Public sector
- Drug Rehabilitation treatment *
- Private and Public sector
- Alcohol Addiction treatment *
- Private and Public sector
- Knee Surgery
- Hip Replacement Surgery

Relapse
- Diet /weight gain (how often do people regain the weight they lose when on a diet) **
- Drug Treament (how often do people relapse or end up back in rehab after recieving treatment for drug addiction)**
- Alcohol Treament (how often do people relapse or end up back in rehab after recieving treatment for alcohol addiction)**
- Depression Treament (how often do people diagnosed and treated for depression commit suicide) **
Extra notes: