Table 8 - Page 1
SAN DIEGO ENERGY USE: TRANSPORTATION SECTOR |
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Sector Characteristics |
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1980 |
1989 |
1991 |
1996 |
2003 |
2010 |
SanDiego County Population |
1,873,300 |
2,432,800 |
2,574,376 |
2,845,987 |
3,237,400 |
3,609,442 |
County Gross Domestic Products (Billion '89 $) |
37.8 |
55.9 |
55.5 |
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County Real Personal Income (Million '89 $) |
32,720.1 |
45,868.0 |
48,577.9 |
56,958.3 |
72,119.5 |
90,488.5 |
County Vehicle Registrations |
1,318,367 |
1,801,324 |
1,831,980 |
2,145,625 |
2,730,452 |
3,478,562 |
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Sources: |
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- Population and Personal Income from SDG&E filing for ER-92. |
- Vehicle Registrations for 1980 -1992 from Caltrans. |
Office of Traffic Improvement, State of California Department of Transportation,
August 10, 1993. |
- Vehicle Registrations for 1996 - 2010 were predicted using a regression
model. personal income for 1980 -1992 as the independent (predictor) variables,
and paid vehicle registrations for 1980 -1992, as the dependent (predicted)
variable. Confidence in the predicted figures is high, since the model yielded
an R-Square = 0.984, and a Standard Error of Estimate = 28,878, meaning
+/- 1.35% error in the predicted value of the 1996 paid vehicle registrations,
1.06% error for 2003, and 0.8% error for 2010. |