/* Set lifetime vehicle profits */
    if (IsSavegameVersionBefore(SLV_LIFETIME_PROFIT)) {
        for (Vehicle *v : Vehicle::Iterate()) {
            if (v->age / DAYS_IN_LEAP_YEAR >= 2) {
                v->profit_lifetime = v->profit_last_year;
            } else if (v->age / DAYS_IN_LEAP_YEAR == 1) {
                YearMonthDay cur_date;
                ConvertDateToYMD(_date, &cur_date);
                YearMonthDay birth_date;
                ConvertDateToYMD(_date - v->age, &birth_date);
                if (cur_date.year - birth_date.year >= 2) {
                    v->profit_lifetime = v->profit_last_year;
                } else {
                    v->profit_lifetime = 0;
                }
            } else {
                v->profit_lifetime = 0;
            }
        }
    }