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APPENDIX B SAMPLE ESTIMATES FOR OAI INTERNATIONAL AVIATION DATA

Table B-1. Round-by-Round Results for Estimating Domestic Ports of Entry/Exit for OAI International Aviation Data (2002)
Round Inbound Outbound
Tons Share Tons Share
All Rounds 4,795,502 empty Cell 3,077,011 empty Cell
1 3,500,541 73 2,300,522 74.8
2 712,928 14.9 366,357 11.9
3 97,311 2 44,210 1.4
4 484,722 10.1 365,923 11.9
Segment Data - All 5,081,136 empty Cell 3,387,022 empty Cell
In-Transit 285,634 5.6 310,011 9.2
Note: Segment data include In-Transit routes that are excluded from the Market data. Additionally, U.S. Territories, Puerto Rico, and the U.S. Virgin Islands trade with each other is excluded from the In-Transit estimate.

Table B-2. A Comparison between Census and OAI Data of Tonnage Shipped by Air (2002)
Customs District Exports ('000 tons) Imports ('000 tons)
Code Name Census OAI Difference Census OAI Difference
0 All Districts 2,524 3,077 553 3,900 4,796 896
1 Portland 0 0 0 0 1 1
2 St Albans 0 0 0 1 0 -1
4 Boston 49 38 -11 57 62 5
5 Providence 0 0 0 0 0 0
7 Ogdensburg 6 0 -6 1 0 -1
9 Buffalo 12 2 -10 2 2 0
10 New York City 440 581 141 911 980 69
11 Philadelphia 66 90 24 74 107 33
13 Baltimore 2 1 -1 3 3 0
14 Norfolk 1 3 3 0 2 1
15 Charlotte 6 10 5 9 14 5
16 Charleston 1 0 0 1 0 -1
17 Savannah 114 117 3 207 192 -16
18 Tampa 10 15 5 15 21 6
19 Mobile 16 42 26 20 41 21
20 New Orleans 161 126 -35 130 163 34
21 Port Arthur 0 0 0 0 0 0
23 Laredo 4 1 -4 2 1 -1
24 El Paso 3 3 0 3 2 0
25 San Diego 1 3 2 2 3 1
26 Nogales 4 4 0 8 6 -2
27 Los Angeles 321 344 23 524 619 95
28 San Francisco 174 176 1 198 221 23
29 Columbia-Snake 12 9 -3 5 8 3
30 Seattle 56 54 -2 36 41 5
31 Anchorage 49 132 83 178 404 226
32 Honolulu 10 48 38 35 71 36
33 Great Falls 9 5 -4 8 8 -1
34 Pembina 3 0 -3 0 2 2
35 Minneapolis 16 12 -4 12 14 2
36 Duluth 1 0 -1 0 0 0
37 Milwaukee 2 0 -2 0 0 0
38 Detroit 53 19 -34 45 45 0
39 Chicago 334 329 -6 520 500 -20
41 Cleveland 158 137 -21 118 129 10
45 St Louis 5 6 1 4 5 0
52 Miami 251 565 314 544 847 303
53 Houston-Galveston 71 68 -3 48 69 21
54 Washington 26 51 25 70 90 20
55 Dallas/Fort Worth 79 86 7 107 123 16
Ratio empty Cell 1.219 empty Cell empty Cell 1.23 empty Cell
Correlation Coefficient empty Cell 0.935 empty Cell empty Cell 0.975 empty Cell
Note: The Customs District for Exports is the District in which the shipment was loaded and the Customs District for Imports is the District in which the shipment was unloaded.

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