Bus Power Sources

YEAR

CLEAN DIESEL

CNG & BLENDS

DIESEL

ELEC-TRIC
& OTHER

GASO-
LINE

LNG &
BLENDS

PRO-
PANE

OTHER
(a)

TOTAL

1993

-

225

50,595

18

257

80

28

422

51,625

1994

-

353

49,716

31

283

287

28

640

51,338

1995

-

678

50,158

37

243

357

31

683

52,187

1996

-

1,074

48,050

41

234

347

29

569

50,344

1997

-

1,562

47,177

24

230

347

25

476

49,841

1998

-

2,148

47,174

33

250

346

12

484

50,447

1999

-

2,494

47,745

41

194

707

9

418

51,608

2000

-

3,072

49,249

68

197

772

25

81

53,464

2001

-

4,137

49,743

80

204

842

57

127

55,190

2002

-

5,497

50,894

113

203

879

87

142

57,815

2003

-

6,178

49,755

146

241

928

90

123

57,461

2004

-

6,035

48,545

181

231

974

101

174

56,241

2005

-

6,873

47,332

606

292

1,044

295

208

56,650

2006 P

618

7,149

44,508

1,022

312

1,068

309

375

55,361

1.1%

12.9%

80.4%

1.8%

0.6%

1.9%

0.6%

0.7%

100.0%