Table 4.

Dates of the retrieval of the samples over the first 30 years, and types of tests conducted.

Year	Date	Germination	Moisture
0	1986, December	X	X
2.5	1989, June	X	X
5	1991, December	X	X
7.5	1994, June	X	X
10	1996, December	X	X
12.5	1999, June	X
15	2001, December	X
17.5	2004, June	X
20	2006, December	X
25	2011, December	X
30	2016, December	X