1975

37,897

3.68

40.11

  8,636

4.23

41.35

3,977

4.89

74.16

3,265

58.00

65.77

1980

39,059

3.53

37.28

12,680

4.29

42.18

5,379

4.96

92.89

5,194

50.85

91.22

1981

38,864

3.46

36.66

12,331

4.01

39.48

5,230

4.81

91.49

4,963

46.43

85.11

1982

34,334

3.00

32.11

11,317

3.51

35.03

4,646

4.17

83.11

4,495

45.36

78.12

1983

33,298

2.80

30.52

11,118

3.32

33.62

4,877

4.20

88.54

4,302

49.11

77.03

1984

34,648

2.83

30.89

11,973

3.34

33.96

5,124

4.21

94.87

4,659

53.04

85.02

1985

34,277

2.74

29.46

12,464

3.21

33.09

5,153

4.17

85.94

4,608

50.72

84.64

1986

36,195

2.83

30.87

13,327

3.20

33.52

5,097

4.02

89.09

4,570

48.63

87.90

1987

36,580

2.75

30.52

14,514

3.27

34.81

5,108

3.83

89.33

4,067

42.78

83.24

1988

36,977

2.67

30.43

15,286

3.13

34.27

5,241

3.80

85.40

3,715

37.06

81.04

1989

35,410

2.50

28.85

15,700

3.00

33.31

4,984

3.49

80.05

3,192

30.78

72.21

1990

34,085

2.39

27.65

15,620

2.81

31.29

4,776

3.27

77.08

3,276

34.28

76.91

1991

31,291

2.22

25.37

14,832

2.49

28.49

4,347

2.91

70.43

2,829

30.82

67.72

1992

29,817

2.08

24.78

14,648

2.28

27.21

4,035

2.63

66.75

2,439

25.52

60.00

1993

30,233

2.09

24.97

15,332

2.27

27.10

4,328

2.71

71.09

2,477

25.01

62.27

1994

30,273

2.07

24.81

16,353

2.30

27.49

4,644

2.73

70.49

2,339

22.84

62.26

1995

30,940

2.09

25.11

17,587

2.35

28.13

4,472

2.51

66.55

2,268

23.15

58.20

1996

30,727

2.05

24.66

18,246

2.32

27.88

4,755

2.60

67.81

2,176

21.94

56.20

1997

30,059

1.97

24.11

18,628

2.26

27.68

4,917

2.57

69.42

2,160

21.43

56.45

1998

29,040

1.87

23.05

19,363

2.25

27.75

4,955

2.52

64.08

2,334

22.70

60.16

1999

28,027

1.79

22.09

19,959

2.21

27.29

4,920

2.43

63.15

2,532

23.92

60.98

2000

27,802

1.76

21.76

20,498

2.17

26.91

4,995

2.43

62.26

2,975

28.42

68.45

2001

27,586

1.73

21.41

20,831

2.13

26.42

4,823

2.31

61.38

3,265

33.87

66.59

2002

27,374

1.70

21.03

21,668

2.14

26.49

4,587

2.14

57.86

3,365

35.23

67.24

2003

26,562

1.65

20.19

22,299

2.14

26.18

4,721

2.17

60.86

3,802

39.70

70.80

2004

25,507

1.57

19.14

22,337

2.04

24.84

4,862

2.15

59.50

4,100

40.80

70.92

1988

3,073,000

222

2,529

   683,000

140

1,530

  96,000

69

1,562

98,000

974

2,129

1989

2,892,000

204

2,355

   727,000

139

1,543

110,000

77

1,770

76,000

732

1,717

1990

2,838,000

199

2,302

   729,000

131

1,460

107,000

73

1,730

82,000

854

1,916

1991

2,615,000

185

2,120

   789,000

132

1,515

  78,000

52

1,264

79,000

856

1,882

1992

2,640,000

184

2,194

   758,000

118

1,409

  95,000

62

1,567

61,000

642

1,509

1993

2,631,000

182

2,174

   843,000

125

1,490

  97,000

60

1,585

56,000

565

1,407

1994

2,785,000

191

2,283

   912,000

128

1,533

  96,000

56

1,452

54,000

526

1,433

1995

2,914,000

197

2,365

1,024,000

137

1,638

  84,000

47

1,244

52,000

530

1,331

1996

2,884,000

192

2,314

1,071,000

136

1,636

  94,000

51

1,339

51,000

512

1,312

1997

2,736,000

179

2,195

1,064,000

129

1,582

  96,000

50

1,349

51,000

501

1,321

1998

2,545,000

164

2,020

1,059,000

123

1,517

  89,000

45

1,146

45,000

433

1,148

1999

2,438,000

156

1,921

1,165,000

129

1,593

101,000

50

1,292

46,000

436

1,111

2000

2,396,000

152

1,876

1,209,000

128

1,587

101,000

49

1,253

53,000

509

1,226

2001

2,279,000

143

1,768

1,218,000

125

1,545

  90,000

43

1,143

57,000

587

1,155

2002

2,136,000

133

1,641

1,210,000

119

1,479

  94,000

44

1,189

58,000

612

1,167

2003

2,129,000

132

1,619

1,233,000

118

1,447

  89,000

41

1,145

64,000

665

1,185

2004

1,990,000

123

1,493

1,246,000

114

1,385

  87,000

38

1,062

70,000

699

1,215

1988

6,050,000

437

4,979

1,542,000

316

3,458

297,000

215

4,839

21,000

207

453

1989

5,678,000

401

4,625

1,613,000

309

3,421

300,000

210

4,825

20,000

188

441

1990

5,485,000

384

4,450

1,654,000

298

3,314

273,000

187

4,411

20,000

208

467

1991

5,084,000

360

4,122

1,675,000

281

3,217

248,000

166

4,022

25,000

268

589

1992

4,852,000

338

4,031

1,704,000

265

3,165

277,000

181

4,586

10,000

100

236

1993

4,789,000

331

3,956

1,884,000

279

3,331

296,000

185

4,861

17,000

169

420

1994

5,126,000

351

4,202

2,023,000

284

3,401

360,000

212

5,467

13,000

128

349

1995

5,335,000

361

4,329

2,149,000

287

3,437

289,000

162

4,307

13,000

131

329

1996

5,281,000

352

4,238

2,274,000

289

3,475

295,000

161

4,209

14,000

138

355

1997

5,116,000

335

4,104

2,314,000

281

3,439

337,000

176

4,761

10,000

102

268

1998

4,896,000

315

3,887

2,315,000

269

3,317

318,000

162

4,114

  9,000

  84

222

1999

4,469,000

285

3,523

2,491,000

276

3,406

369,000

182

4,739

10,000

  96

246

2000

4,467,000

283

3,497

2,621,000

278

3,441

351,000

171

4,377

14,000

133

321

2001

4,399,000

276

3,413

2,679,000

275

3,398

335,000

160

4,261

14,000

150

295

2002

4,443,000

276

3,412

2,757,000

272

3,370

336,000

156

4,232

17,000

173

330

2003

4,356,000

270

3,311

2,804,000

269

3,292

363,000

167

4,681

14,000

142

253

2004

4,216,000

260

3,164

2,886,000

263

3,208

324,000

143

3,970

13,000

133

231

Sources: Vehicle Miles Traveled—Federal Highway Administration, revised by NHTSA; Registered Passenger Cars and Light Trucks—R.L. Polk & Co; Registered Large Trucks and Motorcycles—Federal Highway Administration.