Complex sentence: Passenger traffic is only about 25% of what it was in 1990, given that while freight services are profitable, passenger services are losing money, since fares are regulated by the Anti-Monopoly Committee.
Split into simpler sentences: Passenger traffic is only about 25% of what it was in 1990. While freight services are profitable, passenger services are losing money, since fares are regulated by the Anti-Monopoly Committee.