Frequencies for first 10,000 rows of ser_tr variable in person dataset : VIN SERIES | TRUCK | Freq. Percent Cum. ------------+----------------------------------- | 690 6.90 6.90 *** | 5,875 58.75 65.65 20S | 3 0.03 65.68 30S | 6 0.06 65.74 400 | 2 0.02 65.76 40S | 7 0.07 65.83 44P | 10 0.10 65.93 450 | 1 0.01 65.94 500 | 1 0.01 65.95 600 | 36 0.36 66.31 720 | 10 0.10 66.41 80S | 16 0.16 66.57 830 | 1 0.01 66.58 90S | 14 0.14 66.72 910 | 4 0.04 66.76 920 | 18 0.18 66.94 930 | 1 0.01 66.95 937 | 1 0.01 66.96 940 | 1 0.01 66.97 990 | 5 0.05 67.02 999 | 498 4.98 72.00 ACL | 1 0.01 72.01 ARO | 12 0.12 72.13 AST | 21 0.21 72.34 B20 | 8 0.08 72.42 B22 | 9 0.09 72.51 B23 | 2 0.02 72.53 B25 | 3 0.03 72.56 B26 | 4 0.04 72.60 B30 | 6 0.06 72.66 B40 | 2 0.02 72.68 BRO | 1 0.01 72.69 BUS | 2 0.02 72.71 BZR | 1 0.01 72.72 C10 | 67 0.67 73.39 C15 | 16 0.16 73.55 C20 | 7 0.07 73.62 C25 | 2 0.02 73.64 C30 | 3 0.03 73.67 C35 | 1 0.01 73.68 C40 | 4 0.04 73.72 C60 | 1 0.01 73.73 C6V | 2 0.02 73.75 C96 | 4 0.04 73.79 C97 | 1 0.01 73.80 CCH | 2 0.02 73.82 CHA | 4 0.04 73.86 CHK | 65 0.65 74.51 CLT | 3 0.03 74.54 CLU | 23 0.23 74.77 CNV | 4 0.04 74.81 COE | 25 0.25 75.06 COF | 303 3.03 78.09 COH | 4 0.04 78.13 COL | 7 0.07 78.20 COM | 2 0.02 78.22 CON | 236 2.36 80.58 CSR | 5 0.05 80.63 CTV | 35 0.35 80.98 CVS | 7 0.07 81.05 CWS | 5 0.05 81.10 D10 | 4 0.04 81.14 D15 | 17 0.17 81.31 D20 | 8 0.08 81.39 D21 | 16 0.16 81.55 D30 | 1 0.01 81.56 D51 | 1 0.01 81.57 D60 | 6 0.06 81.63 DAK | 50 0.50 82.13 DEN | 2 0.02 82.15 DIS | 2 0.02 82.17 DRW | 25 0.25 82.42 ECO | 26 0.26 82.68 EPR | 7 0.07 82.75 FCC | 6 0.06 82.81 FE6 | 2 0.02 82.83 FMC | 2 0.02 82.85 FRT | 33 0.33 83.18 GCK | 60 0.60 83.78 GM4 | 279 2.79 86.57 H95 | 1 0.01 86.58 HFE | 2 0.02 86.60 HOM | 2 0.02 86.62 HTL | 3 0.03 86.65 HTP | 63 0.63 87.28 INT | 1 0.01 87.29 JEE | 8 0.08 87.37 JMY | 13 0.13 87.50 K10 | 44 0.44 87.94 K15 | 12 0.12 88.06 K20 | 2 0.02 88.08 K25 | 5 0.05 88.13 LCH | 1 0.01 88.14 LDS | 1 0.01 88.15 LUV | 1 0.01 88.16 M95 | 2 0.02 88.18 MCV | 10 0.10 88.28 MHV | 7 0.07 88.35 MMX | 7 0.07 88.42 NPR | 5 0.05 88.47 NRR | 2 0.02 88.49 P30 | 2 0.02 88.51 P42 | 1 0.01 88.52 PUP | 1 0.01 88.53 R15 | 4 0.04 88.57 R30 | 1 0.01 88.58 R50 | 8 0.08 88.66 RAM | 1 0.01 88.67 RB | 1 0.01 88.68 RBT | 2 0.02 88.70 RMV | 31 0.31 89.01 RMW | 1 0.01 89.02 RNG | 202 2.02 91.04 RPC | 142 1.42 92.46 RRV | 4 0.04 92.50 S | 120 1.20 93.70 S/V | 34 0.34 94.04 S15 | 17 0.17 94.21 S6M | 11 0.11 94.32 SAF | 27 0.27 94.59 SAV | 10 0.10 94.69 SCT | 6 0.06 94.75 SIE | 97 0.97 95.72 SIL | 80 0.80 96.52 SON | 21 0.21 96.73 SRW | 28 0.28 97.01 SS | 1 0.01 97.02 STE | 2 0.02 97.04 STV | 2 0.02 97.06 T10 | 13 0.13 97.19 TAC | 39 0.39 97.58 TNS | 2 0.02 97.60 TOP | 4 0.04 97.64 TRK | 55 0.55 98.19 TUN | 14 0.14 98.33 UDS | 4 0.04 98.37 UHT | 2 0.02 98.39 V10 | 1 0.01 98.40 V15 | 1 0.01 98.41 V20 | 1 0.01 98.42 V25 | 1 0.01 98.43 VAN | 78 0.78 99.21 VVN | 20 0.20 99.41 VWG | 2 0.02 99.43 VYG | 1 0.01 99.44 W/T | 17 0.17 99.61 W/Y | 7 0.07 99.68 W10 | 3 0.03 99.71 W15 | 1 0.01 99.72 W20 | 2 0.02 99.74 WAG | 3 0.03 99.77 WCN | 1 0.01 99.78 WHC | 1 0.01 99.79 X44 | 2 0.02 99.81 XCB | 3 0.03 99.84 YUK | 16 0.16 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Apr 2016