Sample Sizea	Responses			Response Rateb
		Mail	Web	Total	Mail	Web	Total
Study 1 (2008)
1. Mail only	437	282	–	282	64.5	–	64.5
2. Mail/Web choice	436	224	34	258	51.4	7.8	59.2
3. Web preference	445	104	130	234	23.4	29.2	52.6
Total	1318	610	164	774	46.3	12.4	58.7
Study 2 (2009)
Clients providing both postal and e-mail addresses
1. Mail only	151	79	1c	80	52.3	.7	53.0
2. Web preference	137	17	49	66	12.4	35.8	48.2
3. E-mail preference	104	8	58	66	7.7	55.8	63.5
Clients providing only postal address
4. Mail only	538	303	–	303	56.3	–	56.3
5. Web preference	524	150	112	262	28.6	21.4	50.0
Total	1454	557	220	777	38.3	15.1	53.4
Study 3 (2010)
Clients providing both postal and e-mail addresses
1. Mail only	344	202	–	202	58.7	–	58.7
2. E-mail preference	357	82	130	212	23.0	36.4	59.4
3. E-mail augmentation	356	182	41	223	51.1	11.5	62.6
4. E-mail only	310	–	149	149	–	48.1	48.1
Clients providing only postal or e-mail address
5. Mail only	539	318	–	318	59.0	–	59.0
6. E-mail only	228	–	105	105	–	46.0	46.0
Total	2126	784	425	1209	36.9	20.0	56.9