Rank Vs Marks in IIT JEE 2010

Here is my analysis of Rank Vs Marks in IIT JEE 2010. I had collected just 4 data points from the internet and fitted the curve using curve expert. My data points are :

216-6783
246-3967
418-1
9000-190
Please let me know if you are aware of more data points (That would lead to a more accurate graph).

Iit Jee 2010 Rank vs Marks

Rank	Marks
1	418
101	384
201	370
301	359
401	351
501	343
601	337
701	332
801	327
901	322
1001	318
1101	314
1201	310
1301	306
1401	303
1501	300
1601	297
1701	294
1801	291
1901	288
2001	286
2101	283
2201	281
2301	278
2401	276
2501	274
2601	272
2701	270
2801	268
2901	266
3001	264
3101	262
3201	260
3301	258
3401	257
3501	255
3601	253
3701	252
3801	250
3901	249
4001	247
4101	245
4201	244
4301	243
4401	241
4501	240
4601	238
4701	237
4801	236
4901	234
5001	233
5101	232
5201	230
5301	229
5401	228
5501	227
5601	226
5701	224
5801	223
5901	222
6001	221
6101	220
6201	219
6301	218
6401	217
6501	215
6601	214
6701	213
6801	212
6901	211
7001	210
7101	209
7201	208
7301	207
7401	206
7501	205
7601	205
7701	204
7801	203
7901	202
8001	201
8101	200
8201	199
8301	198
8401	197
8501	196
8601	196
8701	195
8801	194
8901	193
9001	192
9101	191
9201	191
9301	190
9401	189