61.   But problems still remain.

62.   But many problems remain.

63.   But six years later, problems remain.

64.   But some problems remain.

65.   But the absolute number of births continues to rise and major problems remain in many impoverished countries.

66.   But the deeper structural problems remained.

67.   But the biggest problem remains the search for excellent people.

68.   But significant problems remain, including some that have dogged the city for decades.