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HELICOPTER AIR SERVICE PROGRAM     435


Table III-34

RELATIONSHIPS BETWEEN FOREIGN TRAVEL EXPENDITURE OF U.S. RESIDENTS AND DISPOSABLE PERSONAL INCOME
(Millions of Dollars)

[[4 Column Table]]

| Year | Foreign Travel Expenditures | Disposable Personal Income | Per Cent (1) of (2) |
| 1929 | 688 | 83,100 | .83% |
| 1937 | 470 | 71,100 | .66 |
| 1947 | 716 | 170,100 | .42 |
| 1950 | 1,022 | 207,700 | .49 |
| 1952 | 1,188 | 237,400 | .50 |
| 1954 | 1,401 | 254,400 | .55 |
| 1956 | 1,814 | 286,700 | .63 |
| 1958 | 2,140 | 317,900 | .69 |
| 1960 | 2,640 | 349,400 | .76 |
| 1962 | 2,895 | 382,900 | .76 |
| 1970 | 4,990 | 499,000 | 1.00 |
| 1975 | 6,640 | 604,000 | 1.10 |

This potential demand will not automatically be translated into air travel as the realization of this potential will depend upon many factor. One of the most important of these is the matter of fares. The economies of subsonic jet aircraft have now demonstrated much lower breakeven points and this will lead to lower fares. At the present time the international carriers are having a difficult time deciding on the precise level of fares but it is to be assumed that the lowered economies will be reflected in the fare structures before long. It appears reasonable, therefore, to project air travel on the basis of the potential demand. 

Air travel now accounts for slightly over 75.7 per cent of all departures from the US by sea and air. It can be assumed that the air penetration of the market will increase as the demand for sea travel has been on a plateau for the past ten years. The potential exists for an expansion in foreign travel bu US citizens for 106 per cent by 1970 and 180 per cent by 1975.

Table III-35

PROJECTION OF U.S. CITIZENS DEPARTING FROM THE UNITED STATES BY SEA AND AIR
(Thousands)

[[4 Column Table]]

| Year | Total | Air | Per Cent Air |
| 1962^1 | 2,292 | 1,736 | 75.7% |
| 1970 | 4,300 | 3,580 | 83.3 |
| 1975 | 5,730 | 4,870 | 85.0 |
^1 Immigration and Naturalization Service

III-44