| obsn no. | x1 | x2 | x3 | x4 | obsn no. | x1 | x2 | x3 | x4 |
| 1 | 1889 | 1651 | 1561 | 1778 | 16 | 1954 | 2149 | 1180 | 1281 |
| 2 | 2403 | 2048 | 2087 | 2197 | 17 | 1325 | 1170 | 1002 | 1176 |
| 3 | 2119 | 1700 | 1815 | 2222 | 18 | 1419 | 1371 | 1252 | 1308 |
| 4 | 1645 | 1627 | 1110 | 1533 | 19 | 1828 | 1634 | 1602 | 1755 |
| 5 | 1976 | 1916 | 1614 | 1883 | 20 | 1725 | 1594 | 1313 | 1646 |
| 6 | 1712 | 1712 | 1439 | 1546 | 21 | 2276 | 2189 | 1547 | 2111 |
| 7 | 1943 | 1685 | 1271 | 1671 | 22 | 1899 | 1614 | 1422 | 1477 |
| 8 | 2104 | 1820 | 1717 | 1874 | 23 | 1633 | 1513 | 1290 | 1516 |
| 9 | 2983 | 2794 | 2412 | 2581 | 24 | 2061 | 1867 | 1646 | 2037 |
| 10 | 1745 | 1600 | 1384 | 1508 | 25 | 1856 | 1493 | 1356 | 1533 |
| 11 | 1710 | 1591 | 1518 | 1667 | 26 | 1727 | 1412 | 1238 | 1469 |
| 12 | 2046 | 1907 | 1627 | 1898 | 27 | 2168 | 1896 | 1701 | 1834 |
| 13 | 1840 | 1841 | 1595 | 1741 | 28 | 1655 | 1675 | 1414 | 1597 |
| 14 | 1867 | 1685 | 1493 | 1678 | 29 | 2326 | 2301 | 2065 | 2234 |
| 15 | 1859 | 1649 | 1389 | 1714 | 30 | 1490 | 1382 | 1214 | 1284 |