I need the number of visitors to main theme parks in USA, for the years
2002 & 2003, such as Disney, MGM, Universal studios, Six flags,
Sea-world ETC. The answer should contain each figure to its related park (not
the whole group) and its year.
I would hope to get the info in form of excel file or a table.
The more data the better.

Hi! Thanks for the question.

I was able to find a list of the attendance for the top 30 theme parks
in the US. The list was taken from Amusement Business. But since
Google Answers are constrained by copyright laws, I cannot provide all
the 2003 figures in full here. I will just make a table for the top
10.

Theme Park                               2003 Attendance Figures (In millions)

1. Magic Kingdom 
Orlando, Florida, USA                                 14.0m 

2. Disneyland 
Anaheim, California, USA                              12.7m 
 
3. Epcot 
Orlando, Florida, USA                                 8.6m 
 
4. Disney-MGM Studios 
Orlando, Florida, USA                                 7.8m 

5. Disney's Animal Kingdom 
Orlando, Florida, USA                                 7.3m 
 
6. Universal Studios Florida 
Orlando, Florida, USA                                 6.8m 
 
7. Islands of Adventure 
Orlando, Florida, USA                                 6.0m 
 
8. Disney's California Adventure 
Anaheim, California, USA                              5.3m 
 
9. Sea World Orlando 
Orlando, Florida, USA                                 5.2m 
 
10. Universal Studios Hollywood                       4.5m
Universal City, California, USA


I wasn?t able to get direct figures for 2002 but since the sources
mention the percentage change of attendance from last year, we can
calculate them as well.

Theme Park                               2002 Attendance Figures (In millions)



1. Magic Kingdom 
Orlando, Florida, USA                                 14.0m 

2. Disneyland 
Anaheim, California, USA                              12.7m 
 
3. Epcot 
Orlando, Florida, USA                                 8.27m 
 
4. Disney-MGM Studios 
Orlando, Florida, USA                                 7.96m 

5. Disney's Animal Kingdom 
Orlando, Florida, USA                                 7.3m 
 
6. Universal Studios Florida 
Orlando, Florida, USA                                 6.8m 
 
7. Islands of Adventure 
Orlando, Florida, USA                                 6.0m 
 
8. Disney's California Adventure 
Anaheim, California, USA                              4.69m 
 
9. Sea World Orlando 
Orlando, Florida, USA                                 5.0m 
 
10. Universal Studios Hollywood                       5.1m
Universal City, California, USA


Again I am constrained by copyright laws to provide full figures here
just like the principle in the first set of figures. I hope you
understand. In case you want to calculate the other figures, a simple
formula for percentages will do. I know you already know this but I
will just include it here to improve the clarity of my answer.

If a theme park has positive growth for example Epcot, here is the
calculation. Where X is the figure for last year (2002).

X + 0.04X = 8.6
1.04X = 8.6
X = 8.6 /1.04
X = 8.27 

If a theme park has negative growth meanwhile like Disney-MGM Studios
then here is the calculation.
 X - 0.02X = 7.8
0.98X = 7.8
X = 7.8/0.98
X = 7.96

Figures for the other theme parks like Six Flags are available from
the first link below. It features the top 30 theme parks in the US in
terms of attendance.

Sources:

?USA Park Attendance? (Top 30 Complete with figures)
http://home.coastergrotto.com:8080/park_attendance.jsp 

?2003 Top Ten Theme Parks? (Top 10 only)
http://themeparks.about.com/cs/usparks/a/attendance2003.htm 


Search terms used:  
"theme park" attendance figures disney mgm 2003

I hope these links would help you in your research. Before rating this
answer, please ask for a clarification if you have a question or if
you would need further information.
                             
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Regards,                              
Easterangel-ga                              
Google Answers Researcher