"Cost 1991","Cost 1992"
2184,2254
921,1770
2989,1091
1234,1620
2290,1273
2943,3137
1856,1871
3284,1096
1248,1481
1136,1265
2625,837
2272,1862
1225,2613
1909,1440
2407,2512
2679,2253
2305,1671
2985,793
1929,3447
2190,1661
1483,841
1623,1470
1953,2225
1809,1475
1595,1384
2839,1770
3094,1250
1130,2464
1696,1987
1531,2109
1606,975
2407,2388
3107,1801
2750,1750
1401,784
1450,1570
1689,1207
2728,1753
3332,
1379,
1832,
2103,