Frequencies for first 10,000 rows of ser_tr variable in person dataset : VIN Truck | series | Freq. Percent Cum. ------------+----------------------------------- | 7,337 73.37 73.37 30S | 1 0.01 73.38 350 | 2 0.02 73.40 4/5 | 2 0.02 73.42 40S | 19 0.19 73.61 44P | 4 0.04 73.65 450 | 1 0.01 73.66 600 | 14 0.14 73.80 700 | 6 0.06 73.86 70S | 3 0.03 73.89 720 | 1 0.01 73.90 80S | 3 0.03 73.93 90S | 4 0.04 73.97 910 | 2 0.02 73.99 920 | 7 0.07 74.06 940 | 8 0.08 74.14 990 | 3 0.03 74.17 ACA | 10 0.10 74.27 ARO | 5 0.05 74.32 AST | 39 0.39 74.71 AVL | 10 0.10 74.81 B23 | 9 0.09 74.90 B30 | 1 0.01 74.91 BSR | 3 0.03 74.94 BUS | 1 0.01 74.95 C10 | 7 0.07 75.02 C15 | 5 0.05 75.07 C20 | 2 0.02 75.09 C55 | 5 0.05 75.14 C75 | 1 0.01 75.15 CAL | 16 0.16 75.31 CAN | 5 0.05 75.36 CCH | 4 0.04 75.40 CHA | 1 0.01 75.41 CHK | 46 0.46 75.87 CMD | 4 0.04 75.91 CNV | 7 0.07 75.98 COE | 6 0.06 76.04 COF | 280 2.80 78.84 COL | 5 0.05 78.89 CON | 211 2.11 81.00 CSC | 13 0.13 81.13 CSR | 1 0.01 81.14 CTV | 26 0.26 81.40 CVS | 1 0.01 81.41 CWS | 12 0.12 81.53 D10 | 1 0.01 81.54 D15 | 3 0.03 81.57 D21 | 4 0.04 81.61 D30 | 3 0.03 81.64 DAK | 45 0.45 82.09 DIS | 3 0.03 82.12 DRW | 34 0.34 82.46 DUR | 4 0.04 82.50 E/D | 3 0.03 82.53 E/X | 1 0.01 82.54 ECO | 24 0.24 82.78 ENV | 10 0.10 82.88 EXP | 10 0.10 82.98 FM2 | 4 0.04 83.02 FM6 | 1 0.01 83.03 FRE | 2 0.02 83.05 FRT | 34 0.34 83.39 GCK | 85 0.85 84.24 GM4 | 95 0.95 85.19 HIN | 3 0.03 85.22 HTL | 1 0.01 85.23 HTP | 10 0.10 85.33 HUM | 7 0.07 85.40 JEE | 2 0.02 85.42 JMY | 8 0.08 85.50 K10 | 2 0.02 85.52 K15 | 14 0.14 85.66 L/M | 1 0.01 85.67 LCF | 2 0.02 85.69 LIB | 10 0.10 85.79 LR3 | 1 0.01 85.80 MCV | 4 0.04 85.84 MHV | 9 0.09 85.93 MNT | 1 0.01 85.94 MON | 5 0.05 85.99 MRK | 3 0.03 86.02 NPR | 4 0.04 86.06 NQR | 1 0.01 86.07 P30 | 4 0.04 86.11 PRO | 10 0.10 86.21 R/V | 7 0.07 86.28 R10 | 1 0.01 86.29 R15 | 8 0.08 86.37 R35 | 1 0.01 86.38 RAI | 1 0.01 86.39 RID | 3 0.03 86.42 RMV | 11 0.11 86.53 RMW | 5 0.05 86.58 RNG | 113 1.13 87.71 RPC | 175 1.75 89.46 RRV | 3 0.03 89.49 RSP | 2 0.02 89.51 RX | 1 0.01 89.52 S | 68 0.68 90.20 S/V | 5 0.05 90.25 S10 | 1 0.01 90.26 S15 | 2 0.02 90.28 SAF | 25 0.25 90.53 SAV | 13 0.13 90.66 SIE | 120 1.20 91.86 SIL | 245 2.45 94.31 SON | 19 0.19 94.50 SPT | 1 0.01 94.51 SRW | 89 0.89 95.40 SS | 4 0.04 95.44 STE | 12 0.12 95.56 STV | 1 0.01 95.57 T10 | 9 0.09 95.66 TAC | 83 0.83 96.49 TER | 4 0.04 96.53 TNS | 1 0.01 96.54 TOP | 2 0.02 96.56 TRK | 17 0.17 96.73 TSR | 1 0.01 96.74 TTN | 28 0.28 97.02 TUN | 51 0.51 97.53 UDS | 1 0.01 97.54 UHT | 5 0.05 97.59 UPL | 9 0.09 97.68 V10 | 1 0.01 97.69 V15 | 3 0.03 97.72 V20 | 2 0.02 97.74 VAN | 23 0.23 97.97 VTR | 7 0.07 98.04 VVN | 31 0.31 98.35 W/T | 19 0.19 98.54 W/Y | 10 0.10 98.64 W20 | 1 0.01 98.65 W30 | 1 0.01 98.66 WCN | 1 0.01 98.67 WHC | 1 0.01 98.68 WIN | 49 0.49 99.17 WRA | 14 0.14 99.31 WUL | 4 0.04 99.35 X44 | 2 0.02 99.37 XCB | 1 0.01 99.38 XPD | 5 0.05 99.43 YUK | 57 0.57 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Apr 2016