Year	Mass (kg)
-5000	27
-4500	23
-4000	23
-3750	32
-1500	14
-1400	57
-1200	12
-1000	39
-1000	27
-1000	27
-800	3
-200	7
-200	8
-150	27
-100	50
-100	5
-100	34
50	41
190	5
400	66
700	5
700	27
900	41
1000	23
1000	23
1050	16
1100	36
1100	7
1170	14
1200	32
1200	23
1350	52
1400	13
1450	18
1500	32
1500	18
1500	25
1550	50
1550	3
1550	5
1550	68
1550	23
1600	9
1600	7
1650	11
1650	34
1650	54
1650	48
1650	90
1650	14
1650	34
1650	36
1650	27
1650	11
1650	11
1650	34
1650	5
1700	18
1700	8
1700	23
1725	9
1750	5
1750	23
1750	34
1750	32
1750	7
1750	6
1750	11
1750	12
1750	34
1750	4
1750	9
1750	27
1800	3
1800	3
1800	36
1800	27
1800	9
1850	15
1850	25
1850	39
1850	29
1850	59
1850	36
1850	27
1850	27
1850	10
1850	27
1850	34
1850	25
1850	18
1850	8
1850	10
1850	7
1850	10
1850	10
1850	32
1850	16
1850	32
1850	32
1850	34
1850	25
1850	34
1850	13
1850	29
1850	18
1850	10
1850	20
1850	29
1850	20
1870	11
1870	34
1870	29
1875	8
1880	25
1880	7
1880	7
1885	6
1900	32
1900	20
1950	23